A set of prehistoric stone artifacts from the last ice age was recently found to contain ... The engravings on the Gönnersdorf plaquettes depict fish and grid-like patterns that researchers ...

This heralded a 20-million-year ice age during which shallow ... this line of backboned animals later went extinct. Fish started becoming more widespread in the fossil record.

A new species of prehistoric fish was found in iron-rich stone in southeastern Australia. Screengrab from Australia Museum's video What can fossils tell us about prehistoric life? The length of a ...