Wonders of the National Parks: A Geology of North America

Carving the Grand Canyon (1x25)

Data di messa in onda: Ott 22, 2015

What did it take to carve the Grand Canyon? Explore theories on how this remarkable chasm came to be. Then take a boat trip through the park, from the Colorado River's access point at Lee's Ferry, down fearsome rapids and into a majestic wonderland. Also, study how humans have changed the river.