By tracking neural crest cells in catshark embryos, researchers discovered that the molecular toolkit behind face-building is ...

Life on our planet began in the water. Eventually, one branch of the fish family tree developed legs and came up on land.

Three species that lived about 308 million years ago challenge the idea that the first land vertebrates underwent ...

Baby crocodile-like early tetrapods called embolomeres. New fossil evidence suggests that these embolomeres did not undergo a metamorphosis the way that modern amphibians do when growing up, which ...

The early four-legged animals, the tetrapods, were the forebears of today’s mammals, birds, reptiles, and amphibians. The post Fossilized babies of ancient predators show how life on Earth was like ...