A time line of Earth's geologic periods from 600 million years ago.

Appreciate the immensity of geologic time by scrolling through a timeline. Includes links to relevant portions of a video lecture and a detailed time line.

A comprehensive timeline of events in the prehistory and history of Ohio. Hyperlinks to the multitude of specific articles about Ohio's history.

Here is an excellent example of a picture timeline. Follow the Eras of the Earth from Cenozoic all the way down to Precambrian with the use of fossils.