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.

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.

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.

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 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.

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

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.

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

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.

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

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