Back from the Dead – Twice

May 14, 20197 days 00
  • The bird Aldabra white-throated rail has rebirthed itself twice after going extinct some 1,36,000 years ago.
  • Scientists have termed it iterative evolution.

  • It means the repeated evolution of similar or parallel structures from the same ancestor, but at different times.
  • It is a chicken sized flightless bird that lives in Indian ocean’s Aldabra atoll.
  • It is indigenous to Madagascar but the fossil of the bird was found in distant Aldabra atoll during
    • two different time periods
    • each separated by many thousands of years.
  • The unique and oldest paleontological record of Aldabra combines with fossil evidence, demonstrates the effects of changing sea levels on extinction and recolonization events.

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