A single track-bearing slab calls into question everything we thought we knew about when modern tetrapods evolved.' ...

A new study links fossilized flying reptile tracks to animals that made them. Fossilized footprints reveal a 160-million-year-old invasion as pterosaurs came down from the trees and onto the ground.

This glimpse into prehistory is possible thanks to two tiny fossil footprints and the dogged ... Monument with a particular interest in ancient tracks, known as trace fossils.