When fossil remains were found that were unlike anything living at the time, some scientists argued that they were unusual examples of living creatures, or that animals known only from fossils ...

Scientists have discovered the oldest known animal with saber teeth: a predator that lived 270 million years ago. This animal, from before the age of the dinosaurs, was a dog-like creature that was ...

Spiders, crabs, and other arthropods evolved from a group of animals that underwent a burst of ... [+] diversity around 500 million years ago. One fossil site provides an extraordinary glimpse ...

The prehistoric creature is thought to have lived around 280-270 million years ago and was likely a "top predator" in its day ...

The fossil is of a small, worm-like creature named Uncus dzaugisi. The discovery fills a significant gap in the understanding of early animal evolution. “Scientists have hypothesized for decades ...