"I'm stunned." says Per Ahlberg of Uppsala University, who coordinated the study; "A single track-bearing slab, which one person can lift, calls into question everything we thought we knew about when ...

Ancient specimens of a previously undescribed species of four-limbed vertebrate fill a gap in the fossil record. The evidence offers surprises about where, when and how these ancestral relatives of ...

Newly discovered tetrapod footprints suggest that the evolution of limbed vertebrates may have occurred nearly 20 million years earlier than scientists previously believed, according to a study ...

It’s beginning to look like our success on land, and that of all tetrapods, from frogs to dogs to dinosaurs, was just a lucky side-effect of fish trying to stay fish. Eons is available to stream on ...