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, ...

Mr. Evans thought that there would be great difficulty in estimating geological periods from the variations between the axis of figure and the axis of rotation, inasmuch as at no given time could ...

One way we can understand the effect of climate change is to look at the geological past - millions of years ago - and the fossil record, to see what happened to organisms during periods of time in ...