This video segment adapted from NOVA features the twisted and melted forms of the Grand Canyon's oldest rocks, the 1.7-billion-year-old Vishnu Schist.

This brief video segment adapted from NOVA uses illustrations and the well-preserved footprints of a small reptile to portray the history of the Grand Canyon's top two rock layers.

This video segment adapted from NOVA explores the effects of the Glen Canyon Dam on the beaches, wildlife, and vegetation of the Colorado River.

This video segment adapted from NOVA uses animation to present the theory of how the Grand Canyon was formed and features rare footage of a phenomenon known as debris flow.

Scientists discuss their research that suggests the Grand Canyon first began to form 17 million years ago. Other scientists take issue with this research. Aired Mar. 07, 2008 [15:17]

Watch videos and read about the adventures of Wilson & Ditch as they travel around the country, learning important and fun facts about each location they visit. This episode focuses on the Grand Canyon. [4:14]

Plan a scientific summer getaway around Grand Canyon geology, tidepools or volcanic lava tubes.