eznews.inA recent study published in the *Journal of Experimental Biology* explores why sharks rarely inhabit freshwater lakes and rivers, revealing significant physiological challenges. While over 1,000 species of elasmobranchs exist, only about 5% can tolerate freshwater, often part-time. Researchers, including Stanford's Adrian Gleiss, found that sharks, unlike bony fish that possess swim bladders for buoyancy, rely on a lipid-rich liver. In freshwater, sharks experience a two- to three-fold increase in negative buoyancy, necessitating a much larger liver to maintain buoyancy, which is energetically costly. The study also analyzed body density in freshwater elasmobranchs, including bull sharks and largetooth sawfish, revealing they have lower liver densities and the highest negative buoyancies recorded. This research underscores the metabolic and ecological barriers that limit sharks' adaptation to freshwater environments. 
Published: Dec 02 2025, 2 ameznews.inA recent study by Professor Nathan MacDonald from the University of Cambridge highlights the profound impact of a 500-year-old Bible map, created by Lucas Cranach the Elder, on modern perceptions of geography and political borders. Printed in 1525, the map was notably flawed, depicting the Mediterranean to the east of Palestine, yet it played a pivotal role in shaping how people understood the Bible and the world. As access to Bibles increased in the 17th century, this map contributed to the notion of political borders as definitive truths rather than symbolic representations. MacDonald argues that the intertwining of biblical narratives and cartography influenced early modern concepts of nationhood, with maps transforming the interpretation of sacred texts. He warns against conflating divine authority with political organization, emphasizing the complexity and evolving nature of both biblical interpretation and political boundaries. The study is published in The Journal of Theological Studies.
Published: Dec 01 2025, 7 pmeznews.inYellowstone National Park, the oldest national park in the U.S., is renowned for its vibrant hot springs and diverse wildlife, including bison and grizzly bears. A significant ecological shift occurred with the reintroduction of wolves in 1995, after a 70-year absence, which has sparked debate among scientists regarding their impact on the ecosystem. Research led by Professor Bill Ripple indicated that the return of wolves initiated a trophic cascade, leading to a remarkable 16-fold increase in willow growth, as elk populations decreased and vegetation flourished. However, a recent rebuttal challenged these findings, citing methodological flaws and inconsistencies in data collection. Ripple's team plans to respond, asserting that their conclusions remain valid despite the criticisms. The ongoing discourse highlights the complexities of ecological restoration and the long-term effects of predator reintroduction in Yellowstone, emphasizing the need for continued research into these dynamic ecosystems.
Published: Dec 01 2025, 11 pmeznews.inA recent study led by Dr. Erica Hartmann from Northwestern University reveals that bathrooms are surprisingly rich in microbial diversity, particularly in the form of bacteriophages—viruses that infect bacteria. Analyzing 34 toothbrushes and biofilm samples from 96 showerheads, the researchers identified 614 viral operational taxonomic units, with many being previously unrecorded. The findings suggest that while some bacteria on toothbrushes may pose health risks, the phages could help control harmful bacterial strains. Hartmann emphasizes the importance of maintaining a balanced microbial ecosystem, cautioning against excessive use of disinfectants, which can lead to antibiotic resistance. The study highlights the unique microbial communities found in individual bathrooms, with little overlap between samples, underscoring the untapped biodiversity present in our homes. Hartmann encourages a more accepting view of these microbes, noting that most are harmless and play a crucial role in our health.
Published: Dec 01 2025, 11 pmeznews.inThe Salton Sea, California's largest lake, is emerging as a potential source of lithium, a crucial metal for the green energy transition. A recent report from researchers at Lawrence Berkeley National Laboratory, funded by the Department of Energy, estimates that up to 18 million metric tons of lithium could be extracted from super-hot brine beneath the lake's southern end, although more conservative estimates suggest around 4 million tons. This "white gold" is vital for producing high-performance batteries for electric vehicles and renewable energy storage. However, the Salton Sea is also known for its severe pollution and environmental degradation, having transformed from a tourist destination into a toxic dust bowl due to agricultural runoff and rising salinity. While the lithium extraction presents an opportunity for sustainable energy development, significant challenges remain regarding the environmental impact and the replenishment of lithium stores.
Published: Dec 02 2025, 12 ameznews.inFans of *Parks and Recreation* have a new equine star to adore, as Pumuckel, the world's shortest living horse, captures hearts with his charming personality and glorious mane. Standing at just 52.6 centimeters (20.7 inches) tall, Pumuckel is notably shorter than the average one-year-old human and surpasses the previous record-holder, Bombel, by a few centimeters. His owner, Carola Weidemann, discovered him in 2020 while searching for small therapy horses, describing her shock at his diminutive size. Pumuckel, a Shetland pony, was not bred for his height but is a "quirk of nature." Now a trained therapy horse, he visits nursing homes and schools, bringing joy to those he meets. When not working, Pumuckel enjoys relaxing in the meadow and indulging in treats like hay and carrots at Weidemann's farm in Germany.
Published: Dec 01 2025, 9 pmeznews.inIn a surprising revelation for British readers, many Americans have never tasted blackcurrant, a popular berry in the UK known for its rich flavor and high vitamin C content. While blackcurrants (_Ribes nigrum_) are a staple in British cuisine, featuring in products like jams and drinks, their absence in the US stems from a historical ban initiated in the early 1900s. This prohibition was a response to the white pine blister rust fungus, which threatened the timber industry. Although the ban was lifted in some states, including New York in 2003, blackcurrants remain largely unknown to most Americans, with estimates suggesting less than 0.1% have ever tried them. Efforts by advocates like Greg Quinn are slowly introducing blackcurrant products to the US market, but confusion persists, as many still associate the "purple" flavor with grape instead of blackcurrant, highlighting a significant cultural divide.
Published: Dec 01 2025, 10 pmeznews.inA recent study in Thailand has revealed the existence of a rare blood type, designated B(A), found in only three individuals out of over half a million samples analyzed. Researchers conducted a retrospective review of 285,450 donor and 258,780 patient samples, identifying fewer than 400 ABO discrepancies, with the new blood type emerging unexpectedly. The B(A) phenotype exhibited a small amount of A antigen activity, a unique genetic variant not previously documented in the Thai population. While this discovery may pose challenges for future blood transfusions, it primarily highlights the complexities of blood typing, a field that has evolved significantly since Karl Landsteiner established the ABO system over a century ago. The findings underscore the need for further research into ABO discrepancies and the genetic mutations that contribute to rare blood types, as detailed in the journal *Transfusion and Apheresis Science*.
Published: Dec 01 2025, 7 pmeznews.inA recent study has delved into the evolutionary journey of species that transitioned from land back to aquatic environments, examining hundreds of museum specimens at the Yale Peabody Museum and other institutions. Researchers conducted over 11,000 measurements and utilized a statistical model to assess fossil features indicative of either aquatic or terrestrial lifestyles. Lead author Caleb Gordon noted the challenges posed by ambiguous limb structures in some species, complicating their classification. The study revealed that hand length measurements were particularly effective in predicting aquatic adaptations, achieving around 90% accuracy. Notably, the findings suggest that _Spinosaurus_ spent significant time submerged, supporting theories of its underwater hunting capabilities. The research, published in *Current Biology*, offers a framework that could enhance understanding of evolutionary history across various species.
Published: Dec 01 2025, 8 pmeznews.inDomestic cats, beloved companions worldwide, can trace their lineage back to North African wildcats from around 2,000 years ago, according to new research. Previously, it was believed that cats were domesticated during the Neolithic period in the Levant, supported by archaeological findings of ancient cat burials. However, a study analyzing the genomes of 70 ancient cats revealed that specimens older than 2,000 years were actually European wildcats, not domestic cats. Researchers, including Marco de Martino, emphasized that while early humans may have coexisted with wildcats, true domestication occurred much later. The first domestic cats, descended from North African wildcats, spread rapidly throughout the Roman Empire, reaching the British Isles by the first century BCE. This research shifts the timeline of cat domestication from thousands of years ago to a more recent period, highlighting a significant change in our understanding of feline history. The findings are published in the journal Science.
Published: Nov 28 2025, 1 amFor the fastest, latest, not so wokest news, 'experts say' you need to visit Eznews
India
World
Economy
Science
Health
Showbiz
Contact