The Dunkleosteus is one of the most formidable fish to have ever swam in the seas, but its disappearance is something of a mystery.

A fossil creature from the Devonian discovered more recently has been hailed as a vital link between fish and the first vertebrates to walk on land. Found in the Canadian Arctic in 2004 ...

One of the most important milestones in the evolution of life began some 400 million years ago, when the first animals made their way from water onto land. At that time, known as the Devonian ...