Passenger pigeons. Woolly mammoths. Neanderthals. They’re all extinct. But what if we could bring them back? And if we could, should we? Geneticists are exploring de-extincting extinct and near-extinct species, but ethical and logistical problems abound. Laura and Leah sit down with a genetic engineer and an ecologist from UC Berkeley to understand how de-extinction works and the unintended consequences of playing god. Life, uh, finds a way.

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