In this fascinating graphic, Leonard Eisenberg presents the age of the earth in one compelling picture. As explained in this article from Business Insider:
The age of the Earth radiates out in both directions from the center of the half-circle. As the world gets older, you can see more and more species populate it. The majority of the species on this graphic are still living--except for a few, like dinosaurs, which are mentioned specifically to point out the five mass extinctions which have changed Earth's history.
One of the more compelling parts of the graphic is when you locate humans, which can be found here:
Leonard Eisenberg's website, evogeneao.com, provides countless other interesting depiction of evolution and resources for teaching evolution.