Threatened Yosemite toads face a hidden winter danger as deadly fungal infections surge while the animals hibernate ...

European rivers carry less organic waste and phosphate than in 2015, but only Slovenia is cleaning up fast enough for its ...

Cosmic rays let a telescope read thunderstorms from the ground, and Earth's magnetic field explains why it sees far more storms to the east.

When a panther chameleon meets a rival, its rapid color change isn't a simple pigment trick. A complex biological process sits behind this transformation.

Humpback whales are famous for long migrations, but one isolated population stays in the Arabian Sea year-round.

A new mouse study suggests the brain may have no fixed information ceiling, as adding more neurons continues to improve processing precision.

Hot, bright, and noisy bedrooms were linked with poorer sleep quality in young adults despite similar sleep duration.

How does the brain juggle so much information? A mouse study suggests neurons can switch jobs as memory demands change.

Jaguars still have connected habitat in South America, but many populations elsewhere face growing isolation and weaker links.

Scientists are studying a remarkably tough desert alga whose unusual metabolism could help boost crop yields and strengthen ...

Three women astronauts use Instagram to blend science with personal stories, pop culture and fashion while challenging STEM ...

Sex chromosomes do more than determine biological sex. Their genes may shape how the brain, immune system, heart, and cancer change with age.