De-extinction: Should We Revive Extinct Species?

Thinking of resurrecting an extinct species? Dodos, passenger pigeons and woolly mammoths could be walking the earth again due to recent advances in breeding, genetics, and cloning technologies. But raising the dead also raises difficult ethical questions, with many scientists and conservationists jumping in on both sides of the debate. How can we implement de-extinction safely and responsibly? Should we be doing it at all?

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