duck duck goose

1 July, 2011 (12:00) | FYI/DIY

Warning, you may not want to watch this.  You may not want to let your kids watch this either.  I’m going to talk about the genitalia of the duck.  Specifically, the male duck.  It’s crazy.  The claim is that female ducks have been evolving to prevent the male from impregnating them by forming twists in their…”tubes”.  In response, the male penis has evolved to “fill up” the tube and spiral around to make sure it gets to where it needs to be…  You just have to watch the video.   Or, read the Discover Magazine article.


Eversions in barriers / from from Carl Zimmer on Vimeo.