Rock of Ages: the Grand Canyon
The Grand Canyon is 270 miles long, up to 18 miles wide, and took approximately 17 million years to form. Think about that, 17 million years. To put that into context, that was about the time of the cycle of Ice Ages began, and was at least 10 million years before the earliest form of humans evolved (Creationists, please exit stage left). What appears to be nothing but a jagged crack in the parched Arizona landscape is actually a thriving oasis of life in the middle of a red desert. It also provides an incredibly accurate slice of what happened to this geographic area completely beyond our scope of Now.

