<p>A scenic vista of Corral Bluffs, outside of Colorado Springs, Colorado. Corral Bluffs represents about 300 vertical feet of rock and preserves the extinction of the dinosaurs through the first million years of the Age of the Mammals. (HHMI Tangled Bank Studios)</p>

A scenic vista of Corral Bluffs, outside of Colorado Springs, Colorado. Corral Bluffs represents about 300 vertical feet of rock and preserves the extinction of the dinosaurs through the first million years of the Age of the Mammals. (HHMI Tangled Bank Studios)