Destructive ForcesStreaming Video - 2010
Why do mountains tend to have a triangular shape? How much rain must fall to start a river? How do single grains of sand accumulate into a dune? This episode from the Amazing Planet series answers those and other geologic questions by capturing the beauty born of eons of unceasing environmental violence as water, wind, and ice erode the surface of the Earth into an ever-changing sculpture of planetary proportion.
Publisher: New York, N.Y. : Films Media Group, , c2007
Characteristics: 1 streaming video file (52 min.) : sd., col., digital file