We will provide a list of web sites with relevant information. The geologic time scale is divided into eons, eras, periods, epochs, and ages. Our activities, and the time scale for download above, ...

Everyone knows that dinosaurs are extinct, and most people have some idea about how it might have occurred. But the exact ...

Eons are the broadest category ... During the first period of the Mesozoic Era (Triassic Period), many new types of animals evolved to fill the available ecological niches created by a mass ...