This is a print-it-yourself file for 34-page booklet that describes the geologic time periods and their events. It uses the timescale of the International Commission on Stratigraphy, 2013 edition. The information is condensed enough that one can form a mental picture of the slow waltz of the continents and the branching and pruning of the Tree of Life. It includes lists of books for children and general adult readers, and websites for further study.