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Phys

Dark matter cannot be ruled out as cause of gamma ray glow at the Milky Way's center, machine learning shows‎

An international research collaboration between the University of Vienna and Lawrence Berkeley National Laboratory in the United States has used machine learning to re-examine one of the most debated signals in astrophysics. The so-called Galactic Center Excess (GCE), a faint, roughly spherical glow of gamma rays at the center of the Milky Way, has fascinated physicists for more than a decade. The new results suggest that an explanation in terms of dark matter cannot currently be ruled out. The results have now been published in the journal Physical Review Letters.

16:24
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Phys

How evolution can make cells smaller without slowing down their growth‎

A new study led by Marco Fumasoni, principal investigator at Fundação GIMM, shows that evolution can substantially reduce cell size without significantly compromising cells' ability to grow. The work, carried out in yeast in collaboration with researchers at Cornell University, is published in Proceedings of the National Academy of Sciences.

16:02
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Phys

UK rivers face rising risk of climate 'whiplash'‎

Climate change could push UK rivers to dangerous extremes and bring more frequent rapid swings between wet and dry conditions—a phenomenon known as hydroclimatic whiplash—according to research led by the University of East Anglia (UEA). Researchers analyzed almost 700 river catchments across the UK to project how river flows may change at 2° C and 4° C of global warming. The results reveal stark regional contrasts and growing challenges for communities and water managers trying to plan for flood and drought risk, particularly in areas that will increasingly experience both.

16:02
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Phys

NASA's Webb catches exoplanet getting roasted‎

One well-done gas giant, coming right up! That's the latest from researchers analyzing NASA's James Webb Space Telescope observations of HD 80606 b, an exoplanet four times the mass of Jupiter with an extremely elliptical orbit that sweeps close by its sun-like star. The research team is presenting its study and preliminary findings Tuesday at the 248th meeting of the American Astronomical Society (AAS248) in Pasadena, California.

15:49
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Phys

Plants maintain photosynthesis in hotter, drier climates by coordinating biochemical processes to stabilize CO₂ levels‎

Researchers at The Australian National University (ANU) have uncovered a mechanism that helps plants continue photosynthesizing under extreme heat and dry air conditions—a finding that could improve how scientists predict the effects of climate change on crops and ecosystems. The study is the first to successfully separate the effects of heat and air dryness on photosynthesis across different carbon dioxide (CO2) levels, which could have significant practical implications for agriculture by helping improve crop management strategies and strengthen food security.

15:49
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Phys

Why just sharing a stick while walking can significantly improve balance‎

Could the secret to preventing dangerous falls be surprisingly simple? For older adults, these unexpected tumbles are a leading cause of injury, affecting roughly 1 in 4 people 65 and older each year. What if the key isn't complex technology or intensive therapy, but something as straightforward as a shared connection? Forget holding hands—new research reveals a surprising twist in how two people can become a dynamic duo against sudden loss of balance.

15:49
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Phys

Radar echoes from Europa reveal secrets beneath the ice‎

A team of scientists has used NASA's Goldstone Solar System Radar and the U.S. National Science Foundation Green Bank Telescope (NSF GBT) to carry out the most extensive radar study to date of Europa, the ocean world orbiting Jupiter. By repeatedly "pinging" Europa with 3.5-centimeter (1.4-inch) radio waves between 2011 and 2024, the team measured how the moon reflects radar signals and confirmed that its icy surface scatters radio energy in an unusually strong and complex way not seen on rocky worlds.

15:26
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Phys

Genetic study finds urban rodents may be evolving against common poisons‎

For years, pest control professionals throughout the Northeast have reported a troubling pattern. In some neighborhoods, rodents seemed increasingly difficult to eliminate, even when standard control methods were used. Now researchers at Rutgers University believe they may know one reason why.

15:26
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Phys

Baby fossils reveal link between human and Neanderthal development‎

An international study of infant remains from 50,000–75,000 years ago has provided new evidence about the developmental trajectory of our evolutionary "cousins," Neanderthals.

14:42
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Phys

Oddball exoplanet challenges what it means to be a hot Jupiter‎

New research led by a scientist at IPAC—a science and data center for astrophysics and planetary science at Caltech—studying the hot Jupiter CoRoT-2 b has settled on one of the three leading hypotheses explaining why its atmosphere has a hot spot in the opposite direction from that seen on all other exoplanets of this type.

14:26
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