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S38 E2: How Wildebeest Saved the Serengeti

In the 1960s, ecologist Tony Sinclair made a breakthrough discovery when he observed a huge population surge of wildebeest in the Serengeti. He found that the wildebeest were the key to keeping the ecosystem balanced and that keystone species could be prey as well as predators.
Aired: 10/9/2019 | 0:02:57
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