Yale researchers reveal secrets of duck sex: It's all screwed up

Wednesday, December 23, 2009 - 02:42 in Biology & Nature

Female ducks have evolved an intriguing way to avoid becoming impregnated by undesirable but aggressive males endowed with large corkscrew-shaped penises: vaginas with clockwise spirals that thwart...

Read the whole article on Science Blog

More from Science Blog

Latest Science Newsletter

Get the latest and most popular science news articles of the week in your Inbox! It's free!

Check out our next project, Biology.Net