WOMEN have suspected it for millennia, and scientists have finally proved it - men cannot have both big brains and big testicles.
Brainiacs and scholars everywhere may gnash their teeth, but according to a recent study of bats, nature forces the males of a species to make a painful trade-off between mental capacity and sperm production.
Because of the high-energy demands of both brains and sperm, scientists believe males cannot generate large amounts of both.
Brainiacs and scholars everywhere may gnash their teeth, but according to a recent study of bats, nature forces the males of a species to make a painful trade-off between mental capacity and sperm production.
Because of the high-energy demands of both brains and sperm, scientists believe males cannot generate large amounts of both.