All of them went extinct in the wild -- and all of them came back, thanks to reintroduction programs. One of the most iconic reintroduction success stories, Przewalski's horse went extinct in the wild in the 1960s, but were returned to the Mongolian steppe in 1992. "The less time that has passed, the more likely that environment is the same as when the species went extinct," she says. "But you still need to address the reason why it went extinct in that environment to begin with." 2020 study highlighted species reintroduction as one of the most effective ways to save endangered animals.

Source: CNN April 16, 2021 07:18 UTC