On an expedition to Greenland in 1987, this University of Cambridge paleontologist unearthed remains of a creature from the Devonian Period (408-360 million years ago) that skulked around swamps on ...

An illustration of Late Devonian animals swimming in the water. About 350 million years ago, long before the dinosaurs stalked the planet, a gigantic fish with deadly fangs hunted river waters on the ...

The first African fossils of Devonian tetrapods (four-legged vertebrates) show these pioneers of land living within the Antarctic circle, 360 million years ago. The first African fossils of Devonian ...

A 10-foot-long, torpedo-shaped fish lurks through murky freshwater, its body casting a shadow on the creatures below. The opened mouth reveals dagger-like fangs, some two inches long, perfect for ...

NOVA: What exactly is a tetrapod? Clack: A tetrapod is an animal with four legs—you, me—or an animal whose ancestors had four legs. So I can talk about a frog, which jumps; a bird, which flies; a ...