Darwin Day Dr. Thornberg and the evolution of human female sexuality

By luck or by fate, his talk was moved and i managed to catch it today, the day before Darwin's 200th birthday. It's still blowing my mind.

Jumping ahead, humans are the only known species in which females don't advertise fertility, In fact, it seems they hide it.

What better place to observe female fertility concealment and mate guarding by males than at a bar.