When wolves were reintroduced to Yellowstone National Park in the United States after being absent nearly 70 years, the most remarkable "trophic cascade" occurred. What is a trophic cascade and how exactly do wolves change rivers? George Monbiot explains.
Watch the official How Wolves Change Rivers 2014 trailer in HD below or find more How Wolves Change Rivers videos on Vidimovie.
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George Monbiot as Narrator
George Monbiot Director
Canada 21 March 2014
These some of the most viewed trailers for movies released in 2014:
10 April 2014
"Die Mamba" is a top international terrorist. A deadly hand-to-hand fighter, sniper, explosives expert and master of masks and deception.
23 September 2014
A haunted investigator teams up with a psychic on a mysterious job that promises a fortune: a search to bring a missing stranger home by Christmas.
23 June 2014
Bright and independent 12-year-old Summer Larsen rescues a sweet, stray dog and will stop at nothing to save him.
05 November 2014
The adventures of a group of explorers who make use of a newly discovered wormhole to surpass the limitations on human space travel and conquer the vast distances involved in an interstellar voyage.
01 April 2014
In the rugged, solitary desert, an elite tactical retrieval team moves in on a small shack, on what they believe will be an ordinary mission.
12 April 2014
Sara takes a job as a cleaner to find her missing daughter and strikes an uneasy alliance with the sinister janitor.
08 May 2014
Istanbul cirminal underworld; a place of merciless families and swaggering hitmen afraid of no one. Kadir Korkut, nicknamed the "Demon" is the most fearsome of their kind.
10 December 2014
Though it sounds incredible, little Ulises with only nine years old, from one day to another grows an enourmous mustache.
15 October 2014
April, 1945. As the Allies make their final push in the European Theatre, a battle-hardened army sergeant named Wardaddy commands a Sherman tank and her five-man crew on a deadly mission behind enemy lines.
24 January 2014
Three boys and two girls go backpacking from the city to a paradisiacal island. There they rent motorcycles, travel around the prettiest and most remote spots, camp out in the woods, on a coastal cliff, get drunk and swim in the sea.
02 May 2014
The lives of a breast-cancer patient and a researcher who is trying to prove a genetic link to cancer intersect in a groundbreaking study.
24 October 2014
A special bond develops between plus-sized inflatable robot Baymax, and prodigy Hiro Hamada, who team up with a group of friends to form a band of high-tech heroes.
Have you watched How Wolves Change Rivers yet? What did you think about it?
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