A young male cat killed near a grade school might have come from as far away as South Dakota in search of territory, food, and mates, experts say.

The giant freshwater species, previously thought to be extinct in the wild, features in local legend as delivering a magic sword to defeat invaders in the 16th century.

In Cambodia conservationists and village chiefs are working together to save one of the world's rarest birds from extinction due to habitat loss.

Christie's Paris is auctioning off trilobites and meteorites this week—but the star item will be a rare Triceratops skeleton expected to fetch over $700,000 (U.S.).

An ancient ancestor of modern elephants lived a more hippo-like lifestyle, dwelling in swamps and rivers and dining on freshwater plants, a new study says.

Researchers in Indonesia have discovered a rare frog species that has no lungs and instead gets all its oxygen through its skin.

Violent clashes with activists combined with fewer whale sightings forced the fleet to return with only 55 percent of this season's hunting target, Japanese officials say.

The world's best preserved woolly mammoth—a 37,000-year-old female—gets CT-scanned in an unprecedented look at prehistoric biology.

A baby woolly mammoth frozen in Arctic Russia has provided the first detailed glimpse of the inner workings of a prehistoric mammal, scientists say.

In anticipation of the worst West Coast salmon season in history, federal managers voted to cancel commercial fishing off the California and Oregon coasts.

Some chimps in Senegal use spears to hunt mammals, a discovery that rocked primatology. Now scientists believe the behavior may offer insights into our ancestors.

Aggressive horses, scared pigs, and hyperactive dogs are some of the "patients" treated by Ida Brajkovic at Croatia's first center for animal psychiatry.

A new technique that looks at chemical clues in seawater suggests that the meteorite that wiped out the dinosaurs 65 million years ago was a mere 2.5 to 3.7 miles (4 to 6 kilometers) across.

Vietnam has opened its first rescue center to house bears freed from illegal bile farms. The animals' bile purportedly cures illnesses in humans.

A system of underwater listening posts off the New England coast detects whale sounds and then automatically alerts ships to slow down to avoid killing the critically endangered animals.