"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 ...

Somewhere between 390 to 360 million years ago, a four-legged vertebrate, or tetrapod, crawled out of the water and gave rise to the amphibians, reptiles and mammals we see today. Scientists have ...

Described as "the missing evolutionary link in the fish to tetrapod transition," a fascinating Canadian fossil reveals an ancient fish species with arm, hand and finger bones similar to our own, ...

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 ...

This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American Here’s something I’ve come back to on a few ...

The habits of a needle-toothed tetrapod which lived more than 370 million years ago have filled in a piece of the evolutionary puzzle after an international team of palaeontologists pieced together ...

A sandstone slab imprinted with clawed footprints could mean that four-legged animals (tetrapods) transitioned from sea to land 35 million years earlier than previously thought. That finding of the ...