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Phys.org / Two Arctic charr populations evolved in less than a century, study finds
Evolution, the process through which animals and other living organisms change their inherited traits over time, typically unfolds slowly over thousands or even millions of years. Some species, however, can adapt at a faster ...
Phys.org / Before North and South America were connected, their mammals found a way to intermingle
Until the Panamanian isthmus formed about 2.8 million years ago, North and South America were isolated continents with unique groups of animals. A riot of marsupials—mammals with brood pouches—and sloths in the south contrasted ...
Medical Xpress / Mice value advance knowledge, even when it reduces water rewards
We all hunger for information. Sometimes this drive leads us to a tangible reward, such as looking up reviews to find the perfect restaurant. But often we seek knowledge as an end unto itself, as when Galileo pointed his ...
Phys.org / Scientists solve mystery of how muscle cells grow and stay healthy
In a study published in Nature Communications biophysicists unravel the mystery of how muscles form at the molecular level and maintain their function. The findings may help design treatments for muscle diseases such as dilated ...
Phys.org / Tiny fossils crack a Cretaceous cold case: Ocean acidification triggered one of the ocean's most severe extinctions
A 113-million-year-old marine murder mystery may finally be solved. Using chemical clues locked inside microscopic fossils, Northwestern University scientists found evidence that ocean acidification drove one of the largest ...
Phys.org / Volcanic eruptions in Pacific Ring of Fire may have cooled Earth for centuries
For around 12,000 years, the Earth has been in the Holocene epoch, a warmer period following a glacial period. During this epoch, however, there have been around 22 abrupt cold phases, each lasting up to several centuries ...
Phys.org / Tiny sugar chains act as brakes to control calcium and sodium flow in lysosomes
Lysosomes are small compartments inside cells that break down and recycle biological materials. Once regarded mainly as cellular waste-disposal centers, lysosomes are now understood to be important signaling hubs for calcium ...
Medical Xpress / Sleep replay of learned skills can occur independently of the hippocampus, mouse study finds
Sleep is a crucial physiological process that supports recovery, clears metabolic waste products from the brain, regulates metabolism and supports the functioning of the immune system. Sleep is also known to play a key role ...
Phys.org / Quantum spin effects may enhance one-way electrical transport in chiral magnets
Quantum fluctuations influence direction-dependent electrical transport in chiral magnets, researchers from Science Tokyo report. In chiral magnetic systems, electric current flows differently depending on its direction, ...
Medical Xpress / Brain training app makes adults with ADHD feel sharper but tests show no real change
Once believed to be a condition that children outgrow, attention deficit hyperactivity disorder (ADHD) is now recognized as a lifelong neurodevelopmental condition that often persists into adulthood. For many adults, it can ...
Phys.org / Light's hidden properties save quantum information from the chaos of bad weather
For years, researchers have tried to harness the "twist" of light to transmit data. This property describes how light spirals as it travels forward, and because it can be molded into a virtually infinite number of different ...
Phys.org / Flash droughts can pull 'alarming' amounts of moisture from the landscape and intensify wildfires
When catastrophic wildfires capture global headlines, such as the unprecedented blazes sweeping through southern Europe this summer or the devastating 2019–20 "Black Summer" in Australia, they are almost always preceded by ...
