The stomach of an Ice Age puppy is shedding new light onto the woolly rhinoceros and what—or what didn't—cause these horned ...

On December 7, two sloth bear cubs were born at the Smithsonian National Zoo. It marks the first time in 12 years that cubs ...

Microscopic ocean algae produce a huge share of Earth’s oxygen—but they need iron to do it. New field research shows that ...

One of North America’s most endangered species is getting a new lease on life thanks to technological innovations. This past ...

Mudskippers break the rules of fish biology by breathing through their skin, walking on their fins and thriving on land where ...

The discovery that tissues use electricity to expel unhealthy cells is part of a surge of renewed interest in the currents ...

A bright green sea slug along America’s coast feeds on sunlight, not food, borrowing plant power to survive months unfed, ...

The platypus is one of evolution's lovable, oddball animals. The creature seems to defy well-understood rules of biology by ...

When oxygen disappears, most fish suffocate. This one ferments its own metabolism and waits months for spring beneath frozen ...

While late M-stars are the easiest places to find Earth-sized planets, a new study suggests they are biological dead ends where animal life may never find enough fuel to evolve.

Sage grouse rely on one of the most visually striking courtship displays in the animal world. Males inflate large chest sacs, producing sounds and movements designed to attract selective females.

A new study reveals a rare-breaking white dwarf star, dubbed RXJ0528+2838, that is somehow generating a rainbow-like "bow ...