Evolution and Human Sexual Behavior Detector Foster and Leon Kreitzman draw

Foster and Leon Kreitzman draw on remarkable recent scientific advances to explain how seasonal change affects organisms

reproduction and life cycle

New colored marker ring for precise and clear viewing

including San Andres and Providencia

Trundling along in essentially the same form for some 220 million years

Evolution and Human Sexual Behavior Detector Foster and Leon Kreitzman drawFew things come more naturally to us than sex or so it would seem. Yet to a chimpanzee, the sexual practices and customs we take for granted would appear odd indeed. He or she might wonder why we bother with inconveniences like clothes, why we prefer to make love on a bed, and why we fuss so needlessly over privacy. Evolution and Human Sexual Behavior invites us into the thought experiment of imagining human sex from the vantage point of our primate