Freezing Sperm to Fight Mass Extinction - Video

Through his nonprofit Nature’s SAFE, Tullis Matson collects and freezes sperm, eggs, and other genetic material from some of the world’s most endangered animals. These samples could, in theory, help make more of these creatures in the future, through cloning and other high-tech methods.

Yet other scientists aren’t sure whether “frozen zoos” are a good tool for combatting extinctions, like Conservation X CEO Alex Dehgan, who thinks more holistic approaches are needed to fight the complex problems facing our planet.

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