Mapping fish migration routes and identifying threats is crucial to protecting freshwater species and their habitats, ecologists argue.  [...]

Cricket frogs were once thought to hop on the water’s surface. They actually leap in and out of the water in a form of locomotion called porpoising.  [...]

These mysterious whitish-gray glows in the northern lights might be cousins of the mauve light streak known as STEVE.

A flash of light called the Platypus has hallmarks of a mid-sized black hole shredding a star and a type of burst thought to be a stellar explosion.  [...]

When sick, Nile tilapia seek warmer water. That behavioral fever triggers a specialized immune response, hinting the connection evolved long ago.  [...]

As wildfires burn the landscape, they prime slopes for debris flows: powerful torrents of rock, mud and water that sweep downhill with deadly momentum.  [...]

Genetic analyses have solved the riddle of where a marsupial mole fits on the tree of life: It’s a cousin to bilbies, bandicoots and Tasmanian devils.  [...]

When Trump’s move to leave WHO takes effect in a year, it may gut funding for global public health and limit U.S. access to crucial data, experts warn.  [...]

High radiation during a time of frenzied star formation in the Milky Way left one stellar population with few chances to form planets, a study reports.  [...]

A Jurassic pterosaur fossil, known to paleontologists for over 160 years, isn’t a new species. It is an odd specimen of Rhamphorhynchus muensteri.  [...]

Thanks to climate change, thawing permafrost in the Canadian Arctic has revealed the buried remnant of a glacier that’s 770,000 years old.  [...]

The first study of copycat urination in an animal documents how one chimpanzee peeing prompts others to follow suit. Now researchers are exploring why.  [...]

The U.S. Food and Drug Administration issued a rule to drastically reduce the amount of nicotine in cigarettes and other combusted tobacco products.  [...]

Logistical needs, like employment and housing, along with psychological needs must be met after disasters like the LA wildfires, research shows.  [...]

As Trump takes office, issues of arms control, the U.S. arsenal and weapons testing will be on the radar for many nuclear weapons researchers.  [...]

The gyrations of hoop-slinging robots reveal that hourglass-shaped objects are best at keeping a hoop in the air.

Chemicals in the tooth enamel of Australopithecus suggest the early human ancestors ate very little meat, dining on vegetation instead.  [...]

One of the most extreme megadroughts has helped fuel wildfires in Los Angeles County and elsewhere in California.

Astronomers have determined the internal composition of a distant, disintegrating planet for the first time.

Since early 2024, the U.S. has logged 66 human cases of H5N1. Scientists are keeping a watchful eye on the virus’s spread as we enter a new year.  [...]