After years of analysis, the animal turned out to be an entirely new species — one that lived millions of years longer than ...

In a dry riverbed in Brazil, in a dense forest near the Amazon, a team of paleontologists found a fossilized jawbone from an ...

In paleontology, lineages that drop out of the fossil record and then re-emerge after long periods are termed ‘Lazarus taxa.’ ...

Researchers discovered that a 215-million-year-old reptile started life on four legs and switched to two as an adult.

With its uniquely twisted jaw and sideways-facing teeth, the new species was a relic of an earlier and more experimental time in the evolution of life on Earth. Fossils discovered in Brazil show that ...

“Living fossil” is often misused, but chitons really haven’t changed much in about 300 million years.

Scientists discovered a bizarre 275-million-year-old aquatic animal with sideways teeth and a twisted jaw in Brazil, revealing a rare “living fossil” lineage from the Permian period.

Scientists say a Chinese fossil site offers the first major look at life after the Sinsk mass extinction.

Sponges may be ancient, but their timeline has been murky. New research suggests the earliest sponges were soft and ...

Based only on jawbones, scientists have described a new salamander-like animal that would have been a “living fossil” for its ...

Scientists at MIT have found compelling chemical evidence that Earth’s earliest animals were likely ancient sea sponges.

The remains of a "weird" creature with a twisted jaw and sideways-facing teeth have been discovered in the Amazon jungle.