How Wolves Change Rivers
Documentary
Overview
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.
Download Subtitles
🌐
Looking for subtitles in another language? Browse all subtitles in 50+ languages →
Recommended Movies
65%
Room 666
02 Jun 1982
70%
Drew: The Man Behind the Poster
19 Jul 2013
68%
Spider-Man: All Roads Lead to No Way Home
03 May 2022
75%
McQueen
08 Jun 2018
74%
More Brains! A Return to the Living Dead
18 Oct 2011
66%
Harmontown
08 Mar 2014
76%
Night Will Fall
07 Jun 2014
61%
Naqoyqatsi
02 Sept 2002
75%
Above Majestic
30 Oct 2018
62%
Evil Influencer: The Jodi Hildebrandt Story
30 Dec 2025
61%
Orgasm Inc: The Story of OneTaste
05 Nov 2022
72%
Avatar: The Deep Dive - A Special Edition of 20/20
13 Dec 2022
75%
Listen to Me Marlon
29 Jul 2015
80%
Joker: Put on a Happy Face
18 Aug 2020
80%
My Mom Jayne
20 Jun 2025
62%
Seduced and Abandoned
20 May 2013
71%
The Class of ‘92
01 Dec 2013
69%
Wormwood
22 Oct 2017
64%
Tabloid
15 Jul 2011
69%
Halloween: 25 Years of Terror
26 Jul 2006