The sea levels all around the world are rising. Current sea-level rise has the potential to affect human populations and the natural environment.
Two key factors have contributed to the observed sea level rise. The first is thermal expansion: as the ocean water warms, it expands. The second is from the influence of land-based ice because of increased melting. The major store of water on land is found in the glaciers and the ice sheets.
The rising of sea levels is one of several lines of evidence that support the view that the climate has recently warmed. Itâ€™s very likely that human-induced warming played a role to the rising of the sea levels observed in the latter half of the 20th century.
Image Caption: This image shows trends in global average absolute sea level between 1870 and 2008. From the cited public-domain source (US Environmental Protection Agency (US EPA), 2010): “After a period of approximately 2,000 years of little change, average sea levels rose worldwide throughout the 20th century, and the rate of change has accelerated in recent years. [&#8230;] When averaged over all the world’s oceans, absolute sea level increased at an average rate of 0.06 inches per year from 1870 to 2008 [&#8230;] From 1993 to 2008, however, average sea level rose at a rate of 0.11 to 0.13 inches per yearâ€”roughly twice as fast as the long-term trend. Credit: US EPA / Wikipedia

What is Current Sea Level Rise?

Mexican,Ajolote,Or,Ambystoma,Mexicanum,Or,Old,Amphibian

You may have come across axolotls - those smiling amphibians with pink, plume-like gills - in pet stores, as plush toys, or even featured in video games. 



Yet, their growing presence in popular culture has emerged just as the wild population of this remarkable species faces critical endangerment.



<h2 class="wp-block-heading" id="h-axolotls-have-become-a-cultural-icon">Axolotls have become a cultural icon</h2>



James Monaghan, a biology professor at <a href="https://www.northeastern.edu/" target="_blank" rel="noreferrer noopener">Northeastern University</a>, has long studied axolotls and their extraordinary regenerative capabilities. “Axolotls have just exploded in popularity the past couple of years,” he said. 



Monaghan recalled that when he began his PhD studies, the general public had little idea what an axolotl was.&nbsp;



“No one knew in the general public what an axolotl was, so I'd have to explain,” he remembered, contrasting that with today’s situation: “Now I just can say, 'Oh, I work on axolotls,' and everyone just lights up.”



Monaghan noted that young people, in particular, have been drawn to axolotls, most likely due to their aesthetic charm.&nbsp;



“They're pink, they have feathers,” he said. “Well, they don't really have feathers, but their gills are feathery. They have a constant little smile on their face. If you were to create a cute animal that you couldn't think existed naturally, it's kind of the axolotl. It's got the vibes of a dragon, but a nice dragon.”



<h2 class="wp-block-heading" id="h-from-ancient-roots-to-gaming-stardom">From ancient roots to gaming stardom</h2>



The axolotl is no newcomer to cultural significance. “It's named after an Aztec god, Xolotl,” Monaghan explained, referencing its deep ties to Mexican heritage. Initially found in Lake Xochimilco near Mexico City, this <a href="https://www.earth.com/news/over-40-of-amphibians-face-extinction-due-to-escalating-climate-threats/" target="_blank" rel="noreferrer noopener">amphibian</a>’s recent surge in popularity has transcended borders.



Its presence in mainstream culture can be traced in part to its introduction into the world of Minecraft, a <a href="https://www.earth.com/news/how-violent-video-games-impact-the-human-mind/" target="_blank" rel="noreferrer noopener">video game</a> of immense popularity.&nbsp;



“Minecraft is enormously popular for young players. The game allows for social play, exploration, sandbox style play where you can make anything,” said Northeastern assistant professor of computer science Alexandra To. By featuring axolotls, the game inspires curiosity and a desire to learn.&nbsp;



“Minecraft provides players great intrinsic motivation to discover more about any new elements that are added to the game,” To added.



In some cases, this might involve players constructing elaborate environments to house every in-game creature. “As my own partner did, in embarking on a project to create an enormous zoo with every in-world animal,” she remarked.



Monaghan suggests that axolotls may have also influenced other media. “I don't know if it's actually the motivation for 'How To Train Your Dragon,'” he said, pointing out that the character Toothless resembles an axolotl with its perpetual smile and ear-like flaps suggesting feathery gills.



<h2 class="wp-block-heading" id="h-scientific-significance-of-axolotls-nbsp">Scientific significance of axolotls&nbsp;</h2>



While their looks and cultural presence have captured public affection, axolotls are scientifically remarkable as well. Their regenerative powers extend beyond limbs. Monaghan’s lab has found that they can regenerate a large portion or their lung.&nbsp;



“They are notoriously resistant to <a href="https://www.earth.com/news/ai-is-the-next-frontier-in-cancer-treatment/" target="_blank" rel="noreferrer noopener">cancers</a>, never get infections after an injury,” he said, and can live for up to two decades - qualities that have made them valuable subjects of study for generations.



“Axolotls are the longest standing lab animal of any animal, longer than flies, longer than worms, longer than mice,” Monaghan said. First collected in 1864 from Lake Xochimilco, their initial appeal stemmed from their unusual, fully aquatic life cycle.&nbsp;



Over time, they became critical for studies on genetics, development, and <a href="https://www.earth.com/news/study-sheds-light-on-the-pathways-of-plant-regeneration/" target="_blank" rel="noreferrer noopener">regeneration</a>. With modern genetic tools like CRISPR, researchers can now pinpoint which genes drive their regenerative capabilities.



All lab and pet axolotls today descend from that original 19th-century population, and this lineage includes the distinct white axolotl familiar to fans worldwide.&nbsp;



“The white axolotl, which seems to be pretty much every stuffed animal that's out there, is actually a mutation of a single animal that was collected in 1864,” Monaghan explained. “You can get color variants, but the pink variety - that's from one founding animal.”



<h2 class="wp-block-heading" id="h-a-species-in-peril">A species in peril</h2>



As axolotls capture hearts around the globe, their wild counterparts hover on the brink of extinction. Once, locals could easily scoop them from Lake Xochimilco’s waters.&nbsp;



“Maybe up to the 1950s, you could put a net in Lake Xochimilco, the canal system, and pull up adult axolotls. And then every decade since, it's just crashed,” Monaghan said. “To the point now that they're critically endangered, and it takes weeks to even find one.”



They are exquisitely sensitive to environmental changes. “Being an amphibian, you're at the whim of your environment. You're taking in everything through your water,” he explained.&nbsp;



Climate change warms these waters, making survival harder, while pollution and introduced species further destroy fragile habitats and devour axolotl eggs.



<h2 class="wp-block-heading" id="h-the-challenge-of-conservation">The challenge of conservation</h2>



Given their success in captivity, one might assume we could simply return these lab and pet lineages to Lake Xochimilco. But it’s not that simple.&nbsp;



“It's probably not the best strategy to take a species that's been inbred since 1864 and reintroduce it into its natural habitat,” Monaghan said.&nbsp;



The modern axolotl has adapted to controlled conditions, while its original environment has changed drastically.&nbsp;



“We can't take the current axolotl and put it into the environment in Mexico City and expect them to thrive the same way as the original collection in 1864. The environment's changed, but the animals themselves have changed.”



Still, rising awareness may help efforts to protect the axolotl’s wild habitat. According to To, the team behind Minecraft has embraced conservation as part of its mission.&nbsp;



“Mojang has been pretty transparent about conservation as one of their core values,” she explained. “The inclusion of axolotls and their in-game rareness mirroring their real-world endangered status is a fantastic example of how game mechanics can reinforce educational messages.”



Monaghan is involved as well, serving on the advisory board of the Ambystoma Genetic Stock Center to support both scientific understanding and conservation. “Those direct efforts could really go a long way toward saving the axolotl,” he said.



All this attention suggests that the axolotl’s time has arrived. “All of a sudden, it seems to be absolutely everywhere,” Monaghan said.&nbsp; Yet, for all the joy and fascination these creatures provide, the work to secure their future in the wild is only just beginning.



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Axolotls have exploded in popularity, but they are also fighting extinction

You may have come across axolotls - those smiling amphibians...

Ants are capable of amazing feats, such as moving objects many times their size. A team of researchers in South Korea has introduced a swarm of magnetic robots that can replicate the extraordinary abilities of ants - and take them even further.



These tiny marvels aren't just mimicking nature; they're set to revolutionize how we approach complex tasks, from medical applications to industrial solutions.



<h2 class="wp-block-heading" id="h-tiny-robots-for-big-tasks">Tiny robots for big tasks</h2>



Researchers at <a href="https://www.hanyang.ac.kr/web/eng" target="_blank" rel="noreferrer noopener">Hanyang University</a> in Seoul, South Korea, have replicated the power of a colony of <a href="https://www.earth.com/news/ants-are-now-using-cars-to-travel-spread-to-new-locations/" target="_blank" rel="noreferrer noopener">ants</a> through an army of microbots. 



These tiny, magnetic robots can work together to perform tasks that would be impossible for a single robot. Peak performance by the microbots was observed when they were grouped in high aspect ratio assemblies.



These microbot armies proved capable of scaling obstacles five times their own length. They could even leap over obstacles one by one, like a sprinter jumping over a hurdle.



<h2 class="wp-block-heading" id="h-mighty-microbots-in-action">Mighty microbots in action</h2>



Picture a battalion of 1,000 microbots forming a raft that <a href="https://www.earth.com/news/microrobots-tested-as-clean-up-crew-for-polluted-waters/" target="_blank" rel="noreferrer noopener">floats on water</a>. This synthetic raft could wrap itself around an object like a pill that weighs in at a whopping 2,000 times the weight of a single microbot.



The raft allowed the microbots to "transport" the pill through a liquid medium. But their usefulness isn't limited to water-based tasks.



On dry land, the microbots could also transport cargo that was 350 times heavier than each individual bot.



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<h2 class="wp-block-heading" id="h-collaborative-efforts-to-overcome-obstacles">Collaborative efforts to overcome obstacles</h2>



Inspiration for the design of the microbots was drawn from ants, which are known for their collaborative efforts to overcome obstacles and ensure their <a href="https://www.earth.com/news/ant-colonies-behave-like-neural-networks-when-making-decisions/" target="_blank" rel="noreferrer noopener">collective survival</a>.



Just like ants, these robots can perform their programmed tasks despite their individual failures, eventually achieving the goal through collective effort.



"Swarm robotics has emerged as a promising methodology for accomplishing complicated tasks through collective behavior of multiple robots," wrote the researchers.



"A key feature of swarm robotics is fault tolerance: while a single robot or multiple robots in a swarm may fail to complete an allocated mission, other robots continue to perform their programmed motions until the mission succeeds."&nbsp;



<h2 class="wp-block-heading" id="h-innovation-in-robot-design">Innovation in robot design</h2>



Instead of using a conventional <a href="https://www.earth.com/news/ai-can-design-and-build-walking-robots-in-seconds/" target="_blank" rel="noreferrer noopener">robot design</a>, the team opted for cube-shaped microbots.



The change in shape allowed a larger surface area - the entire face of each cube - to make contact. This enabled stronger magnetic attractions between the microbots.



Each of these microbots stands only 600 micrometers tall and contains ferromagnetic neodymium-iron-boron (NdFeB) particles. This unique design allows them to respond to magnetic fields and interact with their fellow <a href="https://www.earth.com/news/robots-cannot-outrun-animals-but-theyre-evolving-faster/" target="_blank" rel="noreferrer noopener">robots</a>.



Manipulating the angle at which these microbots were magnetized resulted in the formation of different configurations. 



According to study co-author Jeong Jae Wie, a cost-effective mass-production method involving onsite replica molding and magnetization was developed to ensure uniform geometry and consistent performance.



<h2 class="wp-block-heading" id="h-future-of-microbot-swarms">Future of microbot swarms</h2>



Despite the promising results, there are still improvements to be made. 



Although the microbots can climb, throw things over an obstacle and lift objects, they currently require external magnetic control and lack the ability to navigate independently in complex spaces such as actual narrow arteries.



However, upcoming research aims to enhance the autonomy level of these microbot swarms, focusing on real-time feed control of their movements and trajectories.



The work of the South Korean scientists captures the beauty of innovation at its finest - turning the ordinary into extraordinary.



As we watch the future of medical technology unfold, one thing is clear - these mighty microbots are just the beginning.



<h2 class="wp-block-heading" id="h-potential-applications-beyond-medicine">Potential applications beyond medicine</h2>



While the magnetic microbots are making waves in medical technology, their potential applications extend far beyond the confines of healthcare.



The tiny robots could revolutionize industries such as environmental cleanup and manufacturing.



For instance, their ability to form rafts and transport objects could be adapted to help collect microplastics in oceans or deliver precise doses of chemicals in agriculture.



Additionally, their magnetic responsiveness makes them ideal candidates for assembling intricate components in electronics or even assisting in delicate tasks like repairing machinery in hard-to-reach areas.



Future advances in microbot autonomy could enable them to navigate complex environments independently, opening doors to breakthroughs in swarm-based logistics systems, disaster response technologies, and more.



The full study was published in the journal <a href="https://linkinghub.elsevier.com/retrieve/pii/S2666998624005830" target="_blank" rel="noreferrer noopener">Device</a>.



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Magnetic microbots can replicate the extraordinary abilities of ants

Ants are capable of amazing feats, such as moving objects...

It is a fascinating fact that a swirl of stars, light-years away from us, shares an uncanny resemblance to our home galaxy, the Milky Way.



A group of astronomers has stumbled upon a galaxy in the making that appears to be a mirror image of what our Milky Way might have resembled during its early stages.



<h2 class="wp-block-heading" id="h-firefly-sparkle-and-the-milky-way">Firefly Sparkle and the Milky Way </h2>



Nestled among the cosmos, this nascent galaxy, known as the "Firefly Sparkle," presents an awe-inspiring spectacle. Its unique similarity to a fledgling Milky Way has sparked curiosity among astronomers worldwide.



What makes this discovery even more interesting is the striking timeframe in which the galaxy seems to have come into existence - a mere 600 million years after the <a href="https://www.earth.com/news/new-observations-disprove-big-bang-theory-universe-began-tired-light-theory/" target="_blank" rel="noreferrer noopener">Big Bang</a>, the cosmic event that created the universe as we know it.



This is around the same era that our own galaxy started to form, which adds an additional layer of fascination.



The splendor of the Firefly Sparkle is vividly showcased through images that have been captured by NASA's James Webb Space Telescope.



The images reveal the spectacular <a href="https://www.earth.com/news/stunning-star-clusters-captured-in-the-extreme-outskirts-of-the-milky-way/" target="_blank" rel="noreferrer noopener">clusters of stars</a> that form the galaxy, each twinkling into existence at different periods. This multifarious formation is another attribute that the Firefly Sparkle shares with the Milky Way.



<h2 class="wp-block-heading" id="h-the-significance-of-the-discovery">The significance of the discovery</h2>



Study co-lead author Professor Lamiya Mowla, a distinguished astronomer at <a href="https://www.wellesley.edu/" target="_blank" rel="noreferrer noopener">Wellesley College</a>, emphasized the importance of the discovery.



"These remarkable images give us an unprecedented picture of what our own <a href="https://www.earth.com/news/runaway-star-j1249-36-spotted-trying-to-escape-our-milky-way-galaxy/" target="_blank" rel="noreferrer noopener">galaxy</a> might have looked like when it was being born," said Professor Mowla.



<div class="wp-block-sendtonews-playerselector">[sendtonews key="8TcC2iHHun-4152626-12187" type="single"]</div>



Adding to the significance of the discovery, the size of the Firefly Sparkle mirrors the estimated mass of the Milky Way during its early developmental stages.



This feature sets the newly found galaxy apart from other celestial bodies detected in the same era, which are considerably larger in mass.



"By examining these photos of the Firefly Sparkle, we can better understand how our own Milky Way took shape," explained Professor Mowla.



<h2 class="wp-block-heading" id="h-evolution-of-galaxies-in-the-early-universe">Evolution of galaxies in the early universe</h2>



The mission of observing and understanding the structure and evolution of astronomical bodies in the early universe is of paramount importance. 



This type of research requires a deep investigation into the development of stars, star clusters, galaxies, and galaxy clusters in the early universe and their transformation over time.



"I didn't think it would be possible to resolve a galaxy that existed so early in the <a href="https://www.earth.com/news/webb-telescope-confirms-hubble-constant-our-understanding-of-universe-expansion-very-wrong/" target="_blank" rel="noreferrer noopener">universe</a> into so many distinct components, let alone find that its mass is similar to our own galaxy's when it was in the process of forming," said Professor Mowla.



The tiny Firefly Sparkle galaxy, with its wide array of star formation stages, is shedding new light on our own Milky Way and its past. The images will serve as the basis for extensive study and learning for years to come.



<h2 class="wp-block-heading" id="h-firefly-sparkle-and-galaxy-formation">Firefly Sparkle and galaxy formation</h2>



The discovery of the Firefly Sparkle is not just a marvel in itself but also a foundation for unraveling the broader mysteries of galaxy formation and evolution.



By analyzing its unique star clusters and mass distribution, astronomers can trace the intricate processes that likely occurred during the Milky Way's infancy. 



These findings allow scientists to refine existing models of <a href="https://www.earth.com/news/massive-galactic-explosion-provides-clues-about-galaxy-evolution/" target="_blank" rel="noreferrer noopener">galaxy evolution</a>, and offer a clearer timeline of how cosmic structures transitioned from chaotic gas clouds to the organized systems we see today.



Moreover, the Firefly Sparkle provides a rare opportunity to study star formation in an environment untouched by later cosmic influences, such as galactic mergers or dark matter interactions. 



This glimpse into a pristine galaxy in the early universe helps researchers identify the key factors that shaped not only the Milky Way but also other spiral galaxies scattered across the cosmos.



<h2 class="wp-block-heading" id="h-the-power-of-the-james-webb-space-telescope">The power of the James Webb Space Telescope </h2>



As the James Webb Space Telescope prepares to reveal even greater insights, the Firefly Sparkle may mark the beginning of a series of unprecedented discoveries, each deepening our understanding of the universe's distant past.



“This is just the first of many such galaxies JWST will discover, as we are only starting to use these cosmic microscopes,” noted Maruša Bradač from the <a href="https://www.uni-lj.si/en/university" target="_blank" rel="noreferrer noopener">University of Ljubljana</a>. 



“Just like microscopes let us see pollen grains from plants, the incredible resolution of Webb and the magnifying power of gravitational lensing let us see the small pieces inside galaxies.”



The full study was published in the journal <a href="https://www.nature.com/articles/s41586-024-08293-0" target="_blank" rel="noreferrer noopener">Nature</a>.



Image Credit: NASA, ESA, CSA, Ralf Crawford (STScI)



Video Credit: NASA's Goddard Space Flight Center



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Young galaxy shows us what the early Milky Way looked like

It is a fascinating fact that a swirl of stars,...

If all the world's a stage, and all the species merely players, then their exits and entrances can be found in the rock record. This poetic perspective highlights the continuous evolution and unfolding of life’s history, a narrative that is etched into fossils and the layers of sediment in which they are found.



A recent Virginia Tech analysis has now extended this narrative back to nearly 2 billion years ago, offering a more complete picture of life's origin, diversification, and extinction.



<h2 class="wp-block-heading" id="h-expanding-the-chart-of-life">Expanding the chart of life</h2>



Fossil evidence has charted evolutionary milestones over the past half-billion years, but researchers have now pushed this timeline even further back.



The study, led by <a href="https://www.vt.edu" target="_blank" rel="noreferrer noopener">Virginia Tech</a> geobiologist Shuhai Xiao, expands our <a href="https://www.earth.com/news/discovery-evolution-not-random-gene-families-pangenome-influence-called-revolutionary/" target="_blank" rel="noreferrer noopener">understanding of ancient life</a> to the Proterozoic Eon, which spans 2,500 million to 539 million years ago. 



During this era, life forms were typically smaller and softer, such as sea sponges without mineral skeletons, which were less likely to leave fossil traces.



“This is the most comprehensive and up-to-date analysis of this period to date,” said Xiao. "And more importantly, we’ve used a graphic correlation program that allowed us to achieve greater temporal resolution.”



The team’s findings provide a high-resolution analysis of the global diversity and evolution of Proterozoic life. This chart now offers valuable insights into how life’s story played out during this vast period.



<h2 class="wp-block-heading" id="h-evolution-of-proterozoic-marine-eukaryotes">Evolution of proterozoic marine eukaryotes</h2>



Xiao and his team studied the evolution of ancient marine eukaryotes, which are organisms with cells that have a nucleus. These early eukaryotes were the ancestors of animals, <a href="https://www.earth.com/news/ferns-evolving-backward-a-new-look-at-the-evolution-of-life/" target="_blank" rel="noreferrer noopener">plants</a>, and fungi, and thus they paved the way for complex life on Earth.



The researchers found that eukaryotes first appeared at least 1.8 billion years ago. For the next billion years, often called the "boring billion," not much changed.



Species evolved slowly, and diversity remained stable, with few new species emerging or old ones going extinct.



This calm period eventually ended as Earth experienced dramatic changes. Shifts in the environment and evolution then brought a surge in diversity and set the stage for the development of the complex ecosystems we know today.



<h2 class="wp-block-heading" id="h-snowball-earth-s-impact-on-the-evolution-of-life">Snowball Earth's impact on the evolution of life</h2>



Between 720 million and 635 million years ago, the planet experienced at least two severe ice ages, known as Snowball Earth events. These global glaciations plunged Earth into an icy grip, and reshaped <a href="https://www.earth.com/news/how-life-and-environment-co-evolved-over-500-million-years/" target="_blank" rel="noreferrer noopener">life’s trajectory</a>.



“The ice ages were a major factor that reset the evolutionary path in terms of diversity and dynamics,” Xiao explained. “We see rapid turnover of eukaryotic species immediately after glaciation. That’s a major finding.”



When the ice melted, evolutionary activity surged, marking the end of the “boring billion” and ushering in a more dynamic era of biodiversity.



<h2 class="wp-block-heading" id="h-questions-raised-by-the-findings">Questions raised by the findings</h2>



The study on eukaryotic evolution raises important questions about how environmental and evolutionary forces influenced the development of life on Earth. 



For instance, why did eukaryotic evolution remain so slow and stable during the "boring billion," a period marked by low species turnover? What triggered the rapid evolutionary changes after the Snowball Earth events, when the planet thawed from extreme glaciation?



Key factors under consideration include whether changes in climate and rising atmospheric oxygen levels played a role in accelerating evolution. 



Additionally, scientists wonder whether competition and interactions among organisms created an "evolutionary arms race," that drove species to evolve faster. 



According to Xiao, the team's findings create a foundation for future research. By analyzing the patterns revealed in this study, scientists can delve deeper into the complex relationship between Earth's changing environments and the evolution of life.



<h2 class="wp-block-heading" id="h-new-perspective-on-the-evolution-of-life">New perspective on the evolution of life</h2>



The study of proterozoic life enhances our understanding of how early eukaryotes - the ancestors of modern animals, plants, and fungi - evolved.



The research also reveals how living organisms and Earth’s environment influenced each other in <a href="https://www.earth.com/news/earths-evolution-was-shaped-by-environmental-crises-land-and-sea/" target="_blank" rel="noreferrer noopener">complex and interconnected ways</a> over billions of years.



By extending the timeline of life’s history, this research gives scientists a detailed framework to explore unanswered questions about Earth’s ancient past. It helps us see how events from billions of years ago shaped the planet and life as we know it today.



The study is published in the journal <a href="https://www.science.org/doi/10.1126/science.adm9137" target="_blank" rel="noreferrer noopener">Science</a>.



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Timeline of life’s evolution extended by nearly 1.5 billion years

If all the world's a stage, and all the species...

A new dawn in environmental protection is emerging - one where artificial intelligence (AI) plays an integral role in understanding and mitigating the effects of chemicals on aquatic life.



It's a fascinating blend of cutting-edge technology and environmental science that could revolutionize our approach to safeguarding water health.



The breakthrough comes from an unexpected source - tiny water fleas known as Daphnia. Researchers have found that these minute crustaceans, which are highly sensitive to changes in water quality, can serve as excellent markers of potential environmental hazards.



<h2 class="wp-block-heading" id="h-unknown-chemical-mixtures-and-aquatic-life">Unknown chemical mixtures and aquatic life </h2>



This innovative study was a collaborative effort involving scientists from the <a href="https://www.birmingham.ac.uk/" target="_blank" rel="noreferrer noopener">University of Birmingham</a>, the Research Centre for Eco-Environmental Sciences (RCEES) in China, and the Hemholtz Centre for Environmental Research (UFZ) in Germany.



The team analyzed water samples from the Chaobai River system near Beijing, a body of water that is exposed to <a href="https://www.earth.com/news/predicting-the-effects-of-pollutants-on-river-ecosystems/" target="_blank" rel="noreferrer noopener">pollutants</a> from several sources, including agriculture, domestic waste, and industry.



Study senior author Professor John Colbourne, director of the University of Birmingham’s Centre for Environmental Research and Justice, elaborated on the research.



“There is a vast array of <a href="https://www.earth.com/news/forever-chemicals-found-in-tap-and-bottled-water-worldwide/" target="_blank" rel="noreferrer noopener">chemicals</a> in the environment. Water safety cannot be assessed one substance at a time," said Professor Colbourne.



"Now we have the means to monitor the totality of chemicals in sampled water from the environment to uncover what unknown substances act together to produce toxicity to animals, including humans.”



<h2 class="wp-block-heading" id="h-potentially-harmful-chemical-mixtures">Potentially harmful chemical mixtures</h2>



Published in the journal Environmental Science and Technology, the study reveals that these tiny <a href="https://www.earth.com/news/water-fleas-may-be-the-solution-to-our-global-water-crisis/" target="_blank" rel="noreferrer noopener">water fleas</a> can indicate the presence (and potential harm) of various mixtures of chemicals in the aquatic environment.



Some chemicals, especially in combination, may affect significant biological processes in aquatic organisms. 



What's particularly concerning is that these chemical combinations can create environmental hazards that are potentially greater than when chemicals are present individually.



"Our innovative approach leverages <a href="https://www.earth.com/news/lifes-rules-natural-selection-change-significantly-often-daphnia/" target="_blank" rel="noreferrer noopener">Daphnia</a> as the sentinel species to uncover potential toxic substances in the environment," explained lead author Dr. Xiaojing Li of the University of Birmingham. 



"By using AI methods, we can identify which subsets of chemicals might be particularly harmful to aquatic life, even at low concentrations that wouldn't normally raise concerns." 



<h2 class="wp-block-heading" id="h-harnessing-ai-for-a-safer-environment">Harnessing AI for a safer environment</h2>



The team's use of advanced artificial intelligence is a game changer. Dr. Jiarui Zhou of the University of Birmingham, who is also co-first author of the paper, led the development of the <a href="https://www.earth.com/news/neuromorphic-computing-where-ai-meets-human-brain/" target="_blank" rel="noreferrer noopener">AI algorithms</a>.



“Our approach demonstrates how advanced computational methods can help solve pressing environmental challenges," said Dr. Zhou.



"By analyzing vast amounts of biological and chemical data simultaneously, we can better understand and predict environmental risks."



<h2 class="wp-block-heading" id="h-chemical-discharge-and-environmental-protection">Chemical discharge and environmental protection </h2>



This breakthrough gives us a new tool to identify previously unknown chemical combinations that pose risks to aquatic life, enabling more comprehensive environmental monitoring. 



The research will also support better-informed regulations for chemical discharge into waterways, ultimately leading to improved environmental protection.



Funding was provided by the Royal Society International Collaboration Award, the European Union's Horizon 2020 research and innovation program, and the Natural Environmental Research Council Innovation People program.



With continued support, AI and the diligent water flea will keep playing their part in protecting our precious water bodies.



<h2 class="wp-block-heading" id="h-chemical-mixtures-that-pose-the-greatest-risk">Chemical mixtures that pose the greatest risk</h2>



Artificial intelligence plays a central role in this research. By leveraging advanced computational methods, the research team has significantly advanced environmental science.



AI enables the analysis of vast datasets, including biological responses of Daphnia and chemical profiles of polluted water samples, thus uncovering intricate patterns and interactions that traditional methods often miss.



One of the most notable outcomes is the ability to identify harmful chemical combinations that might be overlooked with conventional testing. 



Machine learning algorithms can predict which mixtures pose the greatest risks to aquatic life, even at concentrations previously considered safe. 



This predictive capability not only improves the efficiency of monitoring but also provides actionable insights for environmental regulators.



Looking ahead, the potential applications of AI extend beyond water fleas and rivers. Similar approaches can be applied to other ecosystems, paving the way for a comprehensive toolkit for environmental monitoring and conservation.



The full study was published in the journal <a href="https://pubs.acs.org/doi/10.1021/acs.est.4c11095" target="_blank" rel="noreferrer noopener">Environmental Science &amp; Technology</a>.



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Chemical mixtures in rivers pose unknown threats to aquatic life

A new dawn in environmental protection is emerging - one...

The Moon, Earth’s eternal companion, continues to captivate scientists. Despite decades of research and lunar missions, one fundamental question remains unresolved: how old is the Moon? 



Current estimates suggest the Moon formed around 4.35 billion years ago, but some evidence hints at an older age that is closer to 4.51 billion years.



This discrepancy has fueled debates and inspired new research, including a recent study proposing that the Moon underwent a "volcanic facelift" billions of years ago.



<h2 class="wp-block-heading" id="h-mystery-of-the-moon-s-age">Mystery of the Moon's age</h2>



Lunar rock samples brought back by missions like <a href="https://www.nasa.gov/specials/apollo50th/missions.html" target="_blank" rel="noreferrer noopener">Apollo</a> have provided crucial insights. These samples indicate that the Moon formed about 200 million years after the solar system’s formation.



However, this timeline seems inconsistent with the chaotic early days of the solar system, during which debris coalesced into planets. 



By the time the Moon supposedly formed, most debris had already merged into larger celestial bodies, making a late-forming Moon improbable.



Adding to the mystery, zircon minerals on the Moon suggest an age of up to 4.51 billion years. This mismatch between lunar rock ages and thermal models has puzzled researchers for years. 



Now, scientists may have an explanation: a massive remelting event caused by tidal forces could have "reset" the Moon's geological clock.



<h2 class="wp-block-heading" id="h-the-role-of-tidal-heating">The role of tidal heating</h2>



In a paper published in the journal Nature, a team led by Professor Francis Nimmo from <a href="https://www.ucsc.edu" target="_blank" rel="noreferrer noopener">UC Santa Cruz</a> explored how tidal forces may have reshaped the Moon's geological history.



“We predict that there shouldn't be any lunar rocks that are older than 4.35 billion years because they should have experienced the same resetting,” said Nimmo.



Tidal heating occurs when gravitational forces create internal friction within a <a href="https://www.earth.com/news/2024-pt5-mini-moon-say-goodbye-to-earths-second-moon-we-barely-got-to-know-you/" target="_blank" rel="noreferrer noopener">celestial body</a>, which generates heat. In the Moon's early history, its proximity to Earth likely amplified these effects.



The researchers propose that around 4.35 billion years ago, the Moon's orbit became unstable, leading to intense tidal forces. This caused widespread volcanic activity that altered the Moon’s surface and reset the age of its rocks.



<h2 class="wp-block-heading" id="h-insights-from-jupiter-s-moon-io">Insights from Jupiter's moon Io</h2>



The study draws parallels between the Moon’s <a href="https://www.earth.com/news/earth-may-have-captured-the-moon-from-space/" target="_blank" rel="noreferrer noopener">past</a> and the current volcanic activity on Jupiter’s moon Io, the most volcanically active body in the solar system.



Io’s elliptical orbit around Jupiter creates tidal forces that heat its interior, driving constant eruptions. Similarly, early tidal heating could have caused the Moon’s mantle to churn, thus melting and reshaping its crust.



The intense volcanic activity likely erased evidence of earlier impacts and geological features. 



According to the researchers, this explains why fewer impact basins are visible on the Moon’s surface than are predicted by models for an older Moon.



<h2 class="wp-block-heading" id="h-new-perspective-on-the-moon-s-age">New perspective on the Moon's age</h2>



Using advanced modeling, Nimmo’s team showed that tidal heating events could have melted significant portions of the Moon’s crust, resetting the ages of most lunar rocks to around 4.35 billion years. 



This process left only a few heat-resistant zircons as remnants of the Moon's earlier history.



“The strong volcanism likely reset the Moon's geological clock,” said Thorsten Kleine, a co-author of the study.



The findings suggest that the Moon itself formed between 4.43 and 4.51 billion years ago, but intense volcanic activity reshaped its crust around 4.35 billion years ago.



This revised timeline resolves contradictions between lunar rock samples, thermal models, and the scarcity of impact basins.



<h2 class="wp-block-heading" id="h-valuable-data-from-unexplored-lunar-regions">Valuable data from unexplored lunar regions</h2>



The study highlights the importance of tidal heating in shaping the Moon’s geological history. 



Nimmo emphasized the need for more detailed simulations and new <a href="https://www.earth.com/news/earth-has-lost-its-mini-moon-2024-pt5-may-have-come-from-our-main-moon/" target="_blank" rel="noreferrer noopener">lunar</a> samples to refine these findings. "We hope that our findings will spark further discussion and exploration,” he said. 



Upcoming missions, like China’s Chang’e 6, are expected to provide valuable data from previously unexplored lunar regions.



These fresh samples could confirm whether a global remelting event did indeed reset the Moon’s geological clock. 



The researchers also plan to investigate how tidal heating affected the Moon’s interior and surface composition.



<h2 class="wp-block-heading" id="h-volcanism-reset-the-moon-s-age">Volcanism reset the Moon's age</h2>



The new findings offer a unifying explanation for several longstanding lunar mysteries. They indicate that volcanism may have reset the ages of lunar rocks and also erased evidence of early impacts and altered the composition of the Moon’s mantle.



“The new results mean that all the pieces of the puzzle that previously didn’t fit together now form a coherent overall picture of the Moon's formation,” said Kleine.



Determining the Moon’s age is crucial for understanding not just its history but also the broader story of the solar system. 



If the Moon’s true age remains elusive, it raises questions about the accuracy of dating methods used for other <a href="https://www.earth.com/news/scientists-learn-composition-of-moons-interior-core-its-not-green-cheese/" target="_blank" rel="noreferrer noopener">celestial bodies</a>. 



With ongoing and future lunar missions, scientists are hopeful that the Moon will finally reveal its secrets, illuminating the early history of our cosmic neighborhood.



The study is published in the journal <a href="https://www.nature.com/articles/s41586-024-08231-0" target="_blank" rel="noreferrer noopener">Nature</a>.



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Earth's moon is much older than we thought, according to new evidence

The Moon, Earth’s eternal companion, continues to captivate scientists. Despite...

Desert locusts are notorious for their ability to transform from solitary insects into devastating swarms under specific environmental conditions. 



Triggered by events like intense rainfall, these swarms can devastate crops, pushing food prices higher and leading to starvation and unrest. But now, a new study offers hope for controlling this menace.



<h2 class="wp-block-heading" id="h-the-extent-of-the-problem">The extent of the problem</h2>



Locust swarms are one of nature's most destructive phenomena. Under favorable conditions, locusts form <a href="https://www.earth.com/news/locusts-have-brains-built-for-complex-odor-processing/" target="_blank" rel="noreferrer noopener">large groups</a>, known as swarms, that can devastate entire regions. 



These swarms can grow so massive that they resemble plagues, consuming staggering amounts of crops in their path.



To put this into perspective, a swarm covering just one square kilometer can eat enough food in a single day to feed 35,000 people.



This destruction severely impacts smallholder farmers, who rely on their crops for food and income. Regions like Africa and Asia, where food security is already fragile, are especially vulnerable. The loss of crops not only disrupts local economies but also threatens millions with hunger.



<h2 class="wp-block-heading" id="h-locust-swarms-are-becoming-more-frequent">Locust swarms are becoming more frequent </h2>



The problem is worsening due to climate change. Increased cyclones and heavy rainfall, driven by <a href="https://www.earth.com/news/we-are-in-a-race-against-time-to-save-our-food-supply-from-climate-change/" target="_blank" rel="noreferrer noopener">global warming</a>, create ideal breeding conditions for locusts. These events bring moisture to arid regions, encouraging vegetation growth that provides food for locusts. 



As a result, locust outbreaks are becoming more frequent and severe, posing an even greater threat to food security in vulnerable regions.



<h2 class="wp-block-heading" id="h-predicting-locust-swarms-in-advance">Predicting locust swarms in advance</h2>



Researchers at the <a href="https://www.cam.ac.uk" target="_blank" rel="noreferrer noopener">University of Cambridge</a> have developed a predictive model to tackle locust swarms.



Using weather forecast data from the UK <a href="https://www.metoffice.gov.uk" target="_blank" rel="noreferrer noopener">Met Office</a> and computational models of locust behavior, the system predicts where swarms will move in their search for food and breeding sites. The results enable early interventions, such as targeted pesticide applications.



"During a desert locust outbreak, we can now predict where swarms will go several days in advance, so we can control them at particular sites," said Dr. Renata Retkute, the lead researcher from Cambridge’s Department of Plant Sciences. 



"And if they're not controlled at those sites, we can predict where they'll go next so preparations can be made there."



<h2 class="wp-block-heading" id="h-new-era-of-locust-control">New era of locust control</h2>



Until now, locust swarm predictions have been inconsistent. The researchers’ model represents a shift toward more effective responses. 



By integrating real-time data on locust lifecycles, breeding behaviors, and weather patterns, the model offers both short- and long-term predictions.



"The important thing is to respond quickly if there's likely to be a big locust upsurge, before it causes a major crop loss. Huge swarms can lead to really desperate situations where people could starve," said Professor Chris Gilligan, senior author of the study.



<h2 class="wp-block-heading" id="h-lessons-from-past-locust-swarms">Lessons from past locust swarms</h2>



The urgency of this innovation stems from a massive locust upsurge from 2019 to 2021, which stretched from Kenya to India.



This event devastated key crops like wheat, maize, and sugarcane, leaving many communities struggling. The response was hampered by disjointed information, revealing the need for a comprehensive model.



"The response to the last locust upsurge was very ad-hoc, and less efficient than it could have been. We've created a comprehensive model that can be used next time to control this <a href="https://www.earth.com/news/extreme-weather-dramatically-increases-the-threat-of-desert-locusts/" target="_blank" rel="noreferrer noopener">devastating</a> pest," said Retkute.



<h2 class="wp-block-heading" id="h-a-tested-and-reliable-tool">A tested and reliable tool</h2>



The new model has undergone rigorous testing using surveillance and weather data from the 2019-2021 upsurge. It now stands ready to inform surveillance, early warnings, and management strategies. 



The Food and Agriculture Organization of the United Nations (<a href="https://www.fao.org/home/en" target="_blank" rel="noreferrer noopener">FAO</a>) and national agencies will use it to improve preparedness and response.



"Countries that haven’t experienced a locust upsurge in many years are often ill-prepared to respond, lacking the necessary surveillance teams, aircraft, and pesticides," noted the researchers. 



Climate change further complicates the picture, altering the movement and spread of <a href="https://www.earth.com/news/trillions-of-cicadas-set-to-emerge-in-historic-u-s-invasion/" target="_blank" rel="noreferrer noopener">swarms</a>, making proactive measures like this model essential.



By combining advanced technology and comprehensive data, the predictive model will help mitigate the devastation caused by desert locust swarms. Using this tool, nations can act quickly and decisively, preventing crop loss and protecting food security for millions of people. 



The study is published in the journal <a href="https://journals.plos.org/ploscompbiol/article?id=10.1371/journal.pcbi.1012562" target="_blank" rel="noreferrer noopener">PLOS Computational Biology</a>.



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Locust swarms threaten food security for millions of people

Desert locusts are notorious for their ability to transform from...

A recent study sheds light on Mars's ancient past, revealing how variations in crustal thickness influenced the planet's magmatic evolution and hydrology.



This research challenges long-standing assumptions about Mars, and suggests that the thick crust under its southern highlands supported granitic magmas and underground aquifers billions of years ago.



<h2 class="wp-block-heading" id="h-evolution-of-mars-s-dynamic-crust">Evolution of Mars’s dynamic crust</h2>



Led by Cin-Ty Lee of <a href="https://www.rice.edu" target="_blank" rel="noreferrer noopener">Rice University</a>, the study uncovers the role of <a href="https://www.earth.com/news/mars-gravity-pulls-earth-closer-to-the-sun-warming-our-climate-scientists-say/" target="_blank" rel="noreferrer noopener">Mars</a>’s southern highlands - where crustal thickness reached up to 80 kilometers (50 miles) during the Noachian and early Hesperian periods (3-4 billion years ago).



Advanced thermal modeling revealed that radioactive heating in these thick crustal regions caused partial melting in the lower crust, and produced felsic magmas like granites.



“Our findings indicate that Mars’s crustal processes were far more dynamic than previously thought,” said Lee.



“Not only could thick crust in the southern highlands have generated granitic magmas without plate tectonics, but it also created the thermal conditions for stable groundwater aquifers - reservoirs of liquid water - on a planet we’ve often considered dry and frozen.”



The research team used advanced computer models to simulate the <a href="https://www.earth.com/news/hidden-water-found-on-mars-would-cover-the-planet-over-one-mile-deep/" target="_blank" rel="noreferrer noopener">conditions of the Martian</a> crust during its ancient epochs, focusing on three critical factors: radioactive heat generation, mantle heat flow, and crustal thickness.



<h2 class="wp-block-heading" id="h-granite-formation-on-mars">Granite formation on Mars</h2>



Radioactive elements in the crust naturally decayed, releasing heat over time, while additional warmth from the planet's mantle contributed to heating the crust from below. 



In areas where the crust exceeded 50 kilometers (31 miles) in thickness, this combination of factors led to partial melting of the lower crust. This process generated granitic magmas, which are rich in silica.



<h2 class="wp-block-heading" id="h-stable-underground-water-reservoirs">Stable underground water reservoirs </h2>



The heat flow from the thick crust also supported stable underground water reservoirs, or aquifers, beneath a frozen surface layer. These aquifers extended several kilometers below the surface, retaining liquid due to the sustained warmth in the thick crustal regions.



Occasionally, volcanic eruptions or asteroid impacts may have disrupted these underground reservoirs, causing water to emerge onto the surface in episodic flooding events. 



The interplay between heat, crust dynamics, and water highlights a much more geologically active and hydrologically dynamic Mars than previously believed. The findings have major implications for the planet’s potential habitability.



<h2 class="wp-block-heading" id="h-significance-of-granite-on-mars">Significance of granite on Mars</h2>



The research debunks the assumption that granites are unique to Earth’s plate tectonics and water recycling processes. 



“Granites aren’t just rocks; they’re geological archives that tell us about a planet’s thermal and chemical evolution,” said Rajdeep Dasgupta. 



“On Earth, granites are tied to tectonics and water recycling. The fact that we see evidence for similar magmas on Mars through deep crustal remelting underscores the planet’s complexity and its potential for <a href="https://www.earth.com/news/how-mars-became-uninhabitable-after-being-life-supporting-ocean-world/" target="_blank" rel="noreferrer noopener">hosting life in the past</a>.”



Hidden beneath basaltic flows in the southern highlands, these granites offer crucial insights into Mars’s geological history.



<h2 class="wp-block-heading" id="h-ancient-water-and-implications-for-habitability">Ancient water and implications for habitability</h2>



The study suggests that <a href="https://www.earth.com/news/mars-curiosity-rover-makes-surprising-find-under-martian-rock-sulfur-crystals/" target="_blank" rel="noreferrer noopener">Mars</a>’s southern highlands may have been more hospitable to life in the past than scientists once believed.



Granitic magmas formed in these regions of the Martian crust are known to contain elements essential for life, such as potassium and phosphorus.



Additionally, the presence of stable underground water reservoirs beneath the highlands adds another layer when considering potential habitability. These liquid water aquifers, protected beneath a frozen surface layer, could have provided a stable environment for microbial life to exist.



The combination of these factors significantly changes how we view Mars’s potential to support life, offering new insights into the planet’s past environments.



<h2 class="wp-block-heading" id="h-roadmap-for-future-exploration">Roadmap for future exploration</h2>



The southern highlands present a promising target for future <a href="https://www.earth.com/news/marss-space-debris-should-be-regarded-as-historical-artifacts/" target="_blank" rel="noreferrer noopener">Mars</a> missions. Large craters and fractures in this region could expose hidden granitic rocks or ancient water reservoirs. 



“Every insight into Mars’s crustal processes brings us closer to answering some of the most profound questions in planetary science, including how Mars evolved and how it may have supported life,” noted study co-author Kirsten Siebach.



”Our research provides a roadmap for where to look and what to look for as we search for these answers.”



<h2 class="wp-block-heading" id="h-a-more-complex-red-planet">A more complex Red Planet</h2>



This study paints a picture of Mars as a more dynamic and complex planet than previously imagined. 



The interplay of thick crustal regions, granitic magmas, and underground aquifers highlights a planet rich in geological and hydrological processes.



These discoveries could reshape our approach to studying Mars and our assessment of whether it could have hosted life in the distant past.



The study is published in the journal <a href="https://www.sciencedirect.com/science/article/abs/pii/S0012821X24005879?via%3Dihub" target="_blank" rel="noreferrer noopener">Earth and Planetary Science Letters</a>.



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Mars has granite that contains the elements essential for life

A recent study sheds light on Mars's ancient past, revealing...

Like parents passing down their distinctive nose or eye color to their children, young planets were thought to be formed after inheriting their chemical makeup directly from the swirling disks of gas and dust that gave birth to them. But nature, it seems, had other plans.



A remarkable study led by Chih-Chun "Dino" Hsu, a postdoctoral associate at Northwestern University's Center for Interdisciplinary Exploration and Research in Astrophysics (CIERA), suggests that we still have alot to learn about how planets form.



<h2 class="wp-block-heading" id="h-front-row-seat-to-planet-formation">Front row seat to planet formation</h2>



Most planets that we find outside of our solar system are already <a href="https://www.earth.com/news/how-planets-formed-in-the-harsh-early-universe/" target="_blank" rel="noreferrer noopener">fully formed</a>, with their birth materials long since scattered to the cosmic winds.



That's what makes the PDS 70 system so special. Located 366 million light-years away in the constellation Centaurus, this stellar nursery gives scientists a "front-row seat" to planet formation in action.



The system features two baby gas giants, similar to Jupiter, that are still in their formative years. At just 5 million years old, these planetary toddlers - named PDS 70b and PDS 70c - are still surrounded by their natal disks, the very materials from which they are forming.



<h2 class="wp-block-heading" id="h-chemical-surprise-in-a-forming-planet">Chemical surprise in a forming planet </h2>



When the research team studied PDS 70b's atmosphere, they found something unexpected. The ratio of carbon to oxygen didn't match what they saw in the surrounding disk of gas and dust.



"For observational astrophysicists, one widely accepted picture of planet <a href="https://www.earth.com/news/planet-formation-new-insights-mechanics-physics/" target="_blank" rel="noreferrer noopener">formation</a> was likely too simplified," said Hsu.



"According to that simplified picture, the ratio of carbon and oxygen gases in a planet's atmosphere should match the ratio of carbon and oxygen gases in its natal disk - assuming the planet accretes materials through gases in its disk. Instead, we found a planet with a carbon and oxygen ratio that is much lower compared to its disk."



<h2 class="wp-block-heading" id="h-faint-planets-next-to-bright-stars">Faint planets next to bright stars </h2>



Studying a planet that is forming next to its bright parent star is no small feat. It's like trying to spot a firefly next to a spotlight.



Jason Wang is an assistant professor at <a href="https://www.northwestern.edu" target="_blank" rel="noreferrer noopener">Northwestern University</a> who co-developed the technology used in the study.



"These new tools make it possible to take really detailed spectra of faint objects next to really bright objects. Because the challenge here is there's a really faint planet next to a really bright star. It's hard to isolate the light of the planet in order to analyze its atmosphere," explained Wang.



The experts used specialized photonics technologies to capture the planet's spectrum - which is essentially its chemical fingerprint. This allowed the team to measure the amount of carbon monoxide and water in the atmosphere of PDS 70b, and calculate the ratio of carbon to oxygen.



<h2 class="wp-block-heading" id="h-possible-explanations-for-the-mismatch">Possible explanations for the mismatch</h2>



The mismatch between the <a href="https://www.earth.com/news/how-do-giant-planets-form/" target="_blank" rel="noreferrer noopener">planet's</a> composition and that of its natal disk poses an interesting puzzle. The research team proposes two possible explanations.



First, the planet might have formed before its disk became enriched with carbon. Think of it like baking a cake. The finished product's ingredients depend on what was available in your kitchen when you started baking - not what you added to your pantry later.



The second possibility involves solid materials. The planet might have grown by absorbing large amounts of ice and dust, not just gas. When these solid materials evaporated, they could have altered the final ratio of carbon to oxygen in the <a href="https://www.earth.com/news/vega-star-system-discovery-forces-us-to-rethink-planet-formation/" target="_blank" rel="noreferrer noopener">planet's atmosphere.</a>



<h2 class="wp-block-heading" id="h-a-better-understanding-of-planet-formation">A better understanding of planet formation </h2>



This study marks the first time scientists have been able to compare information from an exoplanet, its natal disk, and host star. But it's just the beginning. The team plans to study PDS 70c next, hoping to understand better how this entire system formed.



"By studying these two planets together, we can understand the <a href="https://www.earth.com/news/newborn-planet-is-still-glowing-from-the-heat-of-its-formation/" target="_blank" rel="noreferrer noopener">system's formation</a> history even better," said Hsu. "But, also, this is just one system. Ideally, we need to identify more of them to better understand how planets form."



This discovery reminds us that the <a href="https://www.earth.com/news/oceans-of-water-vapor-may-be-involved-in-planet-formation/" target="_blank" rel="noreferrer noopener">universe</a> often defies our expectations. As we continue to peer deeper into space, we are likely to find more surprises that challenge our understanding of how planetary systems come into existence.



The research was supported by the Heising-Simons Foundation, the Simons Foundation, and the National Science Foundation. The findings are published in <a href="https://iopscience.iop.org/article/10.3847/2041-8213/ad95e8">The Astrophysical Journal Letters</a>.



Image Credit: ESO/A. Müller et al.



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How planets form: It's much more complicated than we thought

Like parents passing down their distinctive nose or eye color...

Our teeth, the essential guardians of our oral health, are constantly subjected to the demands of chewing and grinding.



Their outer layer, enamel, is an exceptionally hard substance and the most durable material in the human body. While it provides vital protection, enamel lacks the ability to regenerate or self-repair, unlike other tissues in the body.



Unfortunately, this enamel isn't immune to the ravages of time. A team of researchers has recently explored how enamel morphs with age.



The ultimate goal of the research is to devise ways to maintain the strength and vigor of our teeth for as long as possible.



<h2 class="wp-block-heading" id="h-teeth-contain-more-fluoride-with-age">Teeth contain more fluoride with age</h2>



The study, led by researchers at the <a href="https://www.washington.edu/" target="_blank" rel="noreferrer noopener">University of Washington</a> and the <a href="https://www.pnnl.gov/" target="_blank" rel="noreferrer noopener">Pacific Northwest National Laboratory</a>, scrutinized the atomic makeup of enamel samples taken from the teeth of a 22-year-old and a 56-year-old.



Interestingly, the older tooth harbored increased levels of ion fluoride - an element often added to our drinking water and toothpaste as a protective measure for <a href="https://www.earth.com/news/tooth-enamel-holds-a-record-of-human-health/" target="_blank" rel="noreferrer noopener">enamel</a>.



The researchers investigated how fluoride integrates into enamel as we journey through life.



<h2 class="wp-block-heading" id="h-where-teeth-cracks-begin">Where teeth cracks begin</h2>



Study lead author Jack Grimm is a UW doctoral student in materials science and engineering and a doctoral intern at PNNL.



"We know that teeth get more brittle as people age, especially near the very outer surface, which is where cracks start. There are a number of factors behind this - one of which is the composition of the mineral content," said Grimm.



"We're interested in understanding exactly how the mineral content is changing. And if you want to see that, you have to look at the scale of atoms."



<h2 class="wp-block-heading" id="h-microscopic-structure-of-enamel">Microscopic structure of enamel</h2>



Enamel is composed mostly of minerals arranged in microscopic structures ten thousand times tinier than the width of a human hair, which makes it a challenge to study.



Earlier studies were conducted on a larger scale - about a tenth of the size of a human hair - which made it impossible to discern the relative distribution of minerals and organic portions in enamel's crystalline structure.



To investigate the microscopic structure of enamel more deeply, Grimm collaborated with Arun Devaraj, a materials scientist at the Pacific Northwest National Laboratory (PNNL). Together, they used a sophisticated technique called "atom probe tomography."



This cutting-edge method enabled them to create a 3D map of each atom within a sample, revealing differences in element compositions across three key areas: the nanocrystal core, the shell coating the core, and the space between the shells.



<h2 class="wp-block-heading" id="h-the-role-of-fluoride-as-teeth-age">The role of fluoride as teeth age</h2>



The team found that samples from the older tooth had enhanced <a href="https://www.earth.com/news/too-much-fluoride-in-tap-water-supply-might-lower-kids-iq-by-few-points/" target="_blank" rel="noreferrer noopener">fluoride</a> levels, predominantly in the shell regions.



Study co-author Cameron Renteria is a postdoctoral researcher in oral health sciences at the University of Washington.



"We are getting exposed to fluoride through our toothpaste and <a href="https://www.earth.com/news/strict-pfas-limits-will-make-drinking-water-safer-for-100-million-americans/" target="_blank" rel="noreferrer noopener">drinking water</a>, and no one has been able to track that in an actual tooth at this scale," said Renteria. "Is that fluoride actually being incorporated over time? Now we're starting to be able to paint that picture."



According to the researchers, the strength of their work lies in its interdisciplinary nature. By combining the expertise of different scientific fields, they were able to uncover fascinating insights.



Going forward, the team plans to investigate how the protein composition of enamel evolves over time.



<h2 class="wp-block-heading" id="h-how-enamel-changes-over-time">How enamel changes over time</h2>



Enamel, though resilient, undergoes subtle but impactful transformations as we age. The study revealed that the mineral composition in older enamel is more compact but also more brittle.



Over the years, cycles of demineralization and remineralization, influenced by <a href="https://www.earth.com/news/bronze-age-teeth-discovery-highlight-the-evolution-of-the-human-diet/" target="_blank" rel="noreferrer noopener">diet</a> and exposure to fluoride, lead to structural shifts.



Interestingly, these processes primarily affect the outermost shell of enamel’s nanocrystals, where increased fluoride levels were most evident in older teeth. This outer layer, while stronger against acid attacks, becomes more prone to cracks due to its rigid nature.



<h2 class="wp-block-heading" id="h-preserving-the-strength-of-teeth">Preserving the strength of teeth </h2>



Such changes highlight the delicate balance between strengthening enamel and preserving its flexibility - a challenge that future dental treatments aim to address.



Dentistry offers a clear recommendation: fluoride and fluoridated products are effective in preventing <a href="https://www.earth.com/news/is-water-fluoridation-still-effective/" target="_blank" rel="noreferrer noopener">tooth decay</a>. But when it comes to how aging influences teeth overall, it seems the jury is still out.



The research highlights a key consideration as we grow older - our teeth may become more brittle, requiring us to chew with greater care.



The full study was published in the journal <a href="https://www.nature.com/articles/s43246-024-00709-8" target="_blank" rel="noreferrer noopener">Communications Materials</a>.



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What happens to our teeth as we age? New details have emerged

Our teeth, the essential guardians of our oral health, are...

The gentle murmurs of a baby's first sounds are much more than adorable expressions of joy. These early vocalizations signal the synchronization of an infant's heart and emerging speech abilities.



Research led by Jeremy I. Borjon, an assistant professor of psychology at the University of Houston, reveals a fascinating link between heart rate fluctuations and the development of language in infants. 



The findings shed light on the complex relationship between physical and cognitive growth in early life.



<h2 class="wp-block-heading" id="h-heartbeats-and-infant-speech">Heartbeats and infant speech</h2>



Borjon’s research indicates that a <a href="https://www.earth.com/news/babies-hear-far-more-speech-at-home-than-music/" target="_blank" rel="noreferrer noopener">baby's earliest sounds</a> - those sweet coos, babbles, and even laughs - are directly tied to the rhythm of their heart.



These findings not only deepen our understanding of language development but also provide potential insights into early detection of speech and communication disorders.



“Heart rate naturally fluctuates in all mammals, steadily increasing then decreasing in a rhythmic pattern,” explained Borjon.



The study revealed that infants are most likely to vocalize when their heart rate reaches a local peak (maximum) or trough (minimum). The timing of these vocalizations appears to have specific outcomes:



<ul class="wp-block-list">
<li>Vocalizations at the peak: Longer than expected by chance.</li>



<li>Vocalizations before the trough: More likely to be recognized as words by naïve listeners.</li>
</ul>



This rhythm-driven coordination between heart and speech highlights the role of the autonomic nervous system in early language development.



<h2 class="wp-block-heading" id="h-language-as-a-motor-skill">Language as a motor skill</h2>



While we often think of speech as a cognitive ability, it also depends heavily on motor skills. 



<a href="https://www.earth.com/news/talking-to-babies-in-parentese-boosts-their-language-development/" target="_blank" rel="noreferrer noopener">Babies</a> must learn to coordinate a complex interplay of muscles across their body to produce recognizable sounds. Borjon’s study emphasizes how heart rate dynamics directly influence this coordination.



"Every sound an infant makes helps their brain and body learn how to coordinate with each other, eventually leading to speech," Borjon said. 



By observing 34 infants aged 18 to 27 months, his team measured 2,708 vocalizations, including laughs, babbles, and coos. Despite their limited vocabulary, some of these sounds were recognized as words by listeners, illustrating the early building blocks of language.



Notably, only 10.3% of the vocalizations were reliably identified as words, highlighting the gradual process of language acquisition. Yet every sound, whether or not it forms a word, plays a crucial role in helping infants align their physiological and neurological systems.



<h2 class="wp-block-heading" id="h-infant-speech-development">Infant speech development</h2>



The autonomic nervous system (ANS), responsible for regulating involuntary functions like heart rate and breathing, undergoes rapid growth during a baby’s first few years. 



The research from <a href="https://uh.edu" target="_blank" rel="noreferrer noopener">University of Houston</a> suggests that this development directly impacts an infant's ability to produce recognizable speech.



“The relationship between recognizable vocalizations and decelerating heart rate may imply that the successful development of speech partially depends on infants experiencing predictable ranges of autonomic activity through development,” explained Borjon.



The interplay between predictable heart rate patterns and vocalizations highlights a foundational aspect of speech development. As infants grow, their ability to coordinate autonomic functions and vocalizations improves, eventually leading to the production of more complex speech.



<h2 class="wp-block-heading" id="h-future-research-and-implications">Future research and implications</h2>



Borjon emphasizes the need for continued research to better understand how the autonomic nervous system shapes speech development in <a href="https://www.earth.com/news/baby-talk-sets-the-stage-for-speech-production-in-infants/" target="_blank" rel="noreferrer noopener">infants</a>. 



“Understanding how the autonomic nervous system relates to infant vocalizations over development is a critical avenue of future research for understanding how language emerges, as well as risk factors for atypical language development,” he said.



The findings also hold promise for early intervention strategies. By identifying patterns in heart rate and vocalization timing, researchers could potentially detect speech or communication disorders earlier than current methods allow. 



This proactive approach could help provide timely support for children at risk of language delays.



<h2 class="wp-block-heading" id="h-beyond-the-first-sounds">Beyond the first sounds</h2>



Borjon’s work highlights the intricate connection between physical and cognitive growth during <a href="https://www.earth.com/news/babies-talk-more-when-interacting-with-artificial-objects-than-with-things-made-by-nature/" target="_blank" rel="noreferrer noopener">infancy</a>. 



Speech development involves more than just learning words - it requires a harmonious interplay between the infants brain, body, and environment.



By studying the subtle rhythms of heartbeats and vocalizations, researchers are uncovering the remarkable processes that enable humans to communicate.



In the end, every <a href="https://www.earth.com/news/babies-need-quick-responses-to-their-babbling-to-learn-language/" target="_blank" rel="noreferrer noopener">babble</a> represents more than just a moment of cuteness. These early sounds serve as vital steps in the journey toward mastering language - a journey powered by the steady rhythm of a tiny heart.



The study is published in the&nbsp;<a href="https://www.pnas.org/doi/10.1073/pnas.2419650121" target="_blank" rel="noreferrer noopener">Proceedings of the National Academy of Sciences</a>.



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Infant speech is driven by heart rate activity

The gentle murmurs of a baby's first sounds are much...

Those massive storms that drench the West Coast aren't going to stay the same. Recent research shows that climate change will reshape atmospheric rivers - but not in the way you might expect. 



While these storms will pack more punch everywhere, their evolution will look quite different in Seattle compared to San Diego.



The findings come from a team at the U.S. National Science Foundation National Center for Atmospheric Research (NSF NCAR), led by scientists Christine Shields and Hui Li. 



Their work reveals how these sky-high rivers of moisture will respond differently to warming, depending on where they make landfall.



<h2 class="wp-block-heading" id="h-contrasting-impacts-of-atmospheric-rivers">Contrasting impacts of atmospheric rivers</h2>



The changes split the West Coast into two distinct stories. 



In Southern California, increasing ocean evaporation will drive the transformation of atmospheric rivers. Head north to Seattle and Portland, and it's a different ball game - there, warmer temperatures in both the ocean and air will call the shots.



These differences matter. By 2100, storms hitting the Pacific Northwest could push ocean waters three times higher than today's storms do. Southern California will see higher storm surges too, but not nearly as dramatic as their northern neighbors.



"On the ground, people will see a different response between the Southern California coast and the Pacific Northwest," said Shields. "It's not a one-size-fits-all situation. You have these <a href="https://www.earth.com/news/atmospheric-rivers-are-shifting-with-global-climate-impacts/" target="_blank" rel="noreferrer noopener">regional responses</a> that can be quite different."



<h2 class="wp-block-heading" id="h-science-behind-the-split">Science behind the split</h2>



The research team relied on advanced computing to understand how climate change will reshape atmospheric rivers. 



Using the powerful Derecho supercomputer at the NSF NCAR-Wyoming Supercomputing Center, they ran detailed climate simulations. 



The simulations captured atmospheric changes every 25 kilometers (15.5 miles) and <a href="https://www.earth.com/news/consecutive-atmospheric-rivers-cause-far-more-damage/" target="_blank" rel="noreferrer noopener">ocean changes</a> every 10 kilometers (6.2 miles), offering high-resolution insights into the behavior of these storms.



The results were surprising. In Southern California, the well-known "Pineapple Express" storms, which transport moisture from Hawaii, are expected to intensify due to increased evaporation from the ocean in a warmer climate. This added evaporation provides more fuel for the storms, making them more powerful.



In the Pacific Northwest, however, the dynamics are different. The storms there will strengthen due to a combination of rising air and ocean <a href="https://www.earth.com/news/global-warming-is-disrupting-the-seasonal-flow-of-rivers/" target="_blank" rel="noreferrer noopener">temperatures</a>. These warming effects will amplify the storms' intensity and lead to more dramatic impacts, such as higher sea levels and increased flooding. 



This regional variation highlights how atmospheric rivers respond differently to climate change, depending on their location.



<h2 class="wp-block-heading" id="h-why-the-difference-matters">Why the difference matters</h2>



These aren't just academic distinctions. Communities along the entire West Coast need to prepare for stronger storms, but their specific challenges will vary by location. The stakes are high - atmospheric rivers already pack a serious punch.



"Atmospheric rivers are like tropical cyclones in that they pack powerful winds and carry enormous amounts of water that can devastate local infrastructure," noted Shields.



"Communities need to understand how they will change in the future so they can adapt and plan."



<h2 class="wp-block-heading" id="h-additional-impacts-of-atmospheric-rivers">Additional impacts of atmospheric rivers</h2>



The impacts don't stop when the rain does. These atmospheric rivers leave their mark on the ocean too, stirring up waters and potentially affecting marine ecosystems long after the storms pass.



"The strong winds and precipitation linked to atmospheric rivers can significantly impact the upper ocean, potentially impacting ocean dynamics and ecosystems over larger spatial scales and longer timescales than the present," said Li.



<h2 class="wp-block-heading" id="h-preparing-for-the-future">Preparing for the future</h2>



This research gives coastal communities crucial information for planning their future. While all regions need to prepare for more intense <a href="https://www.earth.com/news/projected-atmospheric-rivers-could-drench-east-asia/" target="_blank" rel="noreferrer noopener">storms</a>, their specific challenges will depend on location. 



Southern California needs to ready itself for storms supercharged by ocean evaporation, while the Pacific Northwest must prepare for even more dramatic changes driven by warming air and seas.



The study was conducted by researchers from <a href="https://ncar.ucar.edu" target="_blank" rel="noreferrer noopener">NSF NCAR</a>, <a href="https://www.tamu.edu" target="_blank" rel="noreferrer noopener">Texas A&amp;M University</a>, and <a href="https://www.psu.edu" target="_blank" rel="noreferrer noopener">Pennsylvania State University</a>, with funding from the U.S. Department of Energy and NSF.



For West Coast residents, the message is clear: the atmospheric rivers they know today won't be the same ones their children will face. But now, at least, they have a better idea of what's coming their way.



The study is published in the journal <a href="https://www.nature.com/articles/s43247-024-01774-0" target="_blank" rel="noreferrer noopener">Nature Communications</a>.



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Atmospheric rivers will become more intense as temperatures rise

Those massive storms that drench the West Coast aren't going...