New look at fossils of primitive flatfish reveals how these fish evolved eyes on one side of their head

Fossilized feathers of an early bird or dinosaur may retain evidence of pigment, offering a chance to animal colors of the Cretaceous.

New fossils of an ancient, four-limbed creature help fill in the blanks of the evolutionary transition between fish and the first land-adapted vertebrates.

Triassic-era sediments unearthed in Antarctica reveal the well-preserved lair of a four-legged, mammal-like reptile.

Woolly mammoths roamed Siberia in two distinct clans, and the split between the groups, scientists say, is surprisingly deep, occurring more than 1 million years ago.

Fossil dig uncovers the oldest known remains of ancestral gibbons

Researchers have recovered microscopic bits of cellulose from 253-million-year-old salt deposits deep underground.