In a group of bark lice, a penis has evolved twice -- in the females. In their nutrient-scarce environment, 'seminal gifts' are an incentive for females to force mating, leading to the co-evolution of female penises and male vaginas.
from Latest Science News -- ScienceDaily http://bit.ly/2BC4dCG
via IFTTT
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment