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MinuteEarth: Season 2017

2017x30 Why Bird Penises Are So Weird

  • 2017-10-25T18:00:00Z on YouTube
  • 3m
  • United States
  • English
  • Documentary
Male birds have the largest genital diversity of any class of animals because their sex chromosomes make it easy to pass male-helping mutations down the line.
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