Animals existed for hundreds of millions of years before there were any humans, so we know about them only through evidence left behind, by careful study of their descendents, or in some cases, by studying living examples which have changed little since prehistoric times.

It seems that the first animals were those which lived in the sea, followed by the group known as dinosaurs, and much later, birds and mammals.

Please submit sites which are non-commercial and are suitable for young people under 19 years of age. Sites listed here will contain information about the lives, extinction or study of prehistoric animals.
Dinosaurs hold a special fascination for children. This category contains sites that are geared toward kids ages 3-18.
All sites submitted to this category should be geared toward children between the ages of 3-18.

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The earliest mammal identified so far is from about 45 million years ago, but we are more familiar with the ones from 10,000 to 70,000 years ago. These co-existed with the first humans, and are better known because of cave paintings, mummified carcasses, tools made from bones, and other remains.
Sites listed here will provide information about prehistoric mammals.
Promotional sites for books, films or other products will not be listed.

more information (editors only)

The earliest animals lived in the sea, and preserved and fossilised remains have provided a lot of information about them, and about conditions on Earth at the time. Many of the fossils discovered so far have been found on land, sometimes hundreds of miles from the sea.
Some present-day marine creatures have changed very little from prehistoric times.
Please submit non-commercial sites about prehistoric marine animals.