3/20/2013

Science is inching closer to being able to viably revive extinct species such as Australia's gastric-brooding frog, which vanished soon after it was discovered in the 1970s. However, technical advances that might make de-extinction possible raise complex ethical questions, including whether we have an obligation to bring back species in whose extinction humans have played a role and whether reviving some species may lead to the extinction of others.

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