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Here Are Some of the Strangest Cases in Evolutionary History So Far

You've heard the age-old riddle: "Which came first: the chicken or the egg?" Taken metaphorically, it's a meditation on the futility of determining the cause of a self-perpetuating cycle. Taken literally, it's a great question for evolutionary biologists.

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Here Are Some of the Strangest Cases in Evolutionary History So Far
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    Aldabra rail: The bird that came back from the dead by evolving twice

    Aldabra rail: The bird that came back from the dead by evolving twice

    The flightless Aldabra rail went extinct 136,000 years ago when its atoll home sank beneath the waves. Then it evolved again. Name: Aldabra rail …

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