You and me baby ain’t nothin’ but mammals, but that doesn’t mean you can act like an ape.
Courtesy of the female great tits.
Leave it to some British psychologists to reduce acts of public goods by men to, simply, competition for females.
Dawn Higginson and her colleagues looked closely several species of beetle, and they all had outrageous sperm.
The Cold War looks like a pillow fight compared to the ancient arms race between humans and the vicious microbes that mate and feed inside them.