Animals

A dead baby thresher shark that washed up on a beach in the U.K. might have been aborted by its mother. Analysis of the juvenile's remains revealed that it had not fully developed.

Melon-size eggs belonging to an extinct and flightless giant 'thunder bird' were eaten by the first Australians.

The odds of an albino giant tortoise are 1 in 100,000.

Where did mammals come from and how did they evolve into more than 5,000 living species today? A new book explains everything about the mammal lineage.

The birds were initially viewed as exotic animals.

The reasons for prehistory's roster of bigger animals range from dinosaur physiology to mammalian social groups.

For millions of years, megalodon was the top predator in marine ecosystems. Then great whites came along and ruined everything.

Male spiders that dance to their own beat are more likely to win mates compared to those that stick to a formula, new research finds.

Scientists uncovered 16.9 million-year-old fossils of the beast.

A malformed megalodon tooth hinted at an injury that caused it to develop with a split down the middle.

Dolphins can recognize each other by the taste of their pee, and urine-tasting behavior is also linked to "name" recognition.

In a behind-the-scenes look at 'Prehistoric Planet,' see how the creators went to extraordinary lengths to make the dinosaur series feel like an authentic nature documentary.

Scientists recently linked elevated stress levels in male mice to a compound found in females' urine — and bananas.

A dead beaked whale with mysterious injuries on its face recently washed up on a California beach. Experts are unsure why the animal died or even which species it belongs to.

Dinosaur metabolisms were diverse; some lineages were cold-blooded like their lizard cousins, while others were warm-blooded like their avian relatives alive today.

A new study of bones from the Grand Canyon reveals that this steep, rocky landscape was once a hunting ground for the extinct American cheetah.

Scientists recently discovered fossils in Argentina that belong to Thanatosdrakon. The specimens are the largest pterosaurs ever found in South America.