Echidnas have a four-headed penis, an evolutionary adaptation that remains one of the most baffling and ridiculous anatomical features ever discovered by baffled zoologists.

A closer look

Echidnas have a four-headed penis, an evolutionary adaptation that remains one of the most baffling and ridiculous anatomical features ever discovered by baffled zoologists. During mating, only two of the heads become engorged at a time while the other two remain dormant, and the mammal alternates which pair it uses with each successive encounter. While humans are out here relying on questionable dating apps and pickup lines, the echidna is out roaming the Australian outback equipped with a biological Swiss Army knife for reproduction. Nature looked at this spiky, ant-eating monotreme and decided its reproductive organs needed the aesthetic complexity of a medieval mace. It just proves that evolution does not strive for elegance or logic, but rather enthusiastically embraces chaotic, terrifying designs just to see what kind of weirdness actually works