Geologic Time is a crucial concept to understanding the history of the earth—including the evolution of life ... The geologic time scale is divided into eons, eras, periods, epochs, and ages. Our ...

Rocky formation across Scotland and Ireland dates back to Snowball Earth era READ MORE ... Snowball Earth refers to a period in our planet's history when it was totally or almost totally frozen ...

Learn about the time period that took ... of the Cenozoic era—dinosaurs, pterosaurs, and giant marine reptiles were conspicuously absent from the face of the Earth. Rodent-size (and perhaps ...