The third chimpanzee: the evolution and future of the human animal

pt. 1. Just another species of big mammal. A tale of three chimps

The great leap forward

pt. 2. An animal with a strange life cycle. The evolution of human sexuality

The science of adultery

How we pick our mates and sex partners

Sexual selection, and the origin of human races

Why do we grow old and die?

pt. 3. Uniquely human. Bridges to human language

Animal origins of art

Agriculture's mixed blessings

Why do we smoke, drink, and use dangerous drugs?

Alone in a crowded universe

pt. 4. World conquerors. The last first contacts

Accidental conquerors

Horses, Hittites, and history

In black and white

pt. 5. Reversing our progress overnight. The golden age that never was

Blitzkrieg and thanksgiving in the new world

The second cloud.