University of Illinois Extension

Round Two

After that first ice age, life started to rebound. What is now Europe and North America were combined, and both were at or near the equator.

Late Devonian Global

Illustration of Earth During Devonian

Ichthyostega

Illustration of Ichthyostega

By about 400 million years ago, amphibians were beginning to make their way onto land.

In water, many types of fishes could be found.  The first types of fish did not have a jaw.  Later, jawed fish became more common.  This was also a time when the first sharks could be found.

Xenacanthus

Illustration of Xenacanthus

Another mass extinction caused many types of sea life to disappear around 354 million years ago.
(See Going, Going, Gone section)