Evolutionary biology: Well endowed.

The article reports on the evolution of the male genitalia size of animals as published in the "Biology Letters." It states that the condition is believed to have evolved in response to election pressures that come into play during or after copulation. The study conducted by Andrew Kahn and his team at the Australian National University in Canberra shows that females spend around one-and-a-half times longer associating with the better-endowed males.