In 1958, the US moved 25 caribou to an Alaska island as emergency food for military personnel; by 2005, their herd had grown to 2,750

A herd of just 25 caribou calves released on a remote Alaskan island in 1958 to provide emergency meat for US military personnel eventually grew to 2,750 animals by 2005. The rapid growth placed heavy pressure on the fragile ecosystem of the Aleutian Islands.

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