Ever wondered why we need men?
. . .Biologists have always puzzled over why males have survived given that their only contribution to reproduction is sperm.
It makes far more sense in evolutionary terms to have an all-female asexual population which creates daughters who can reproduce rather than sons who cannot, such as the Mexican whiptail lizard.
But new research suggests that sexual competition for mates keeps populations healthy, free of disease and genetically diverse. . .
It wouldn’t be hard to think of some other reasons, would it?
Hat tip: Tim Worstall