Forgot your password?
typodupeerror
Science

+ - Why Men Don't Have Spines on Their Penises-> 4

Submitted by sciencehabit
sciencehabit (1205606) writes "Most male mammals wield a penis covered with spines made of keratin, the same material that forms fingernails, to sweep out competitors' sperm and irritate a female into ovulating. Even chimpanzees, our closest relatives, have penile spines. So why don't men? A new study suggests that this feature disappeared due to a chunk of DNA that went missing after our evolutionary divergence from chimps. The researchers have identified another DNA deletion that may have contributed to humans' bigger brains."
Link to Original Source
This discussion was created for logged-in users only, but now has been archived. No new comments can be posted.

Why Men Don't Have Spines on Their Penises

Comments Filter:

"Of course power tools and alcohol don't mix. Everyone knows power tools aren't soluble in alcohol..." -- Crazy Nigel

Working...