Click to return to the Evolution Home Page
darwin change extinction survival sex humans religion
two giraffes  
Why Sex?
related web activities
In evolutionary terms, sex is more important than life itself. Sex fuels evolutionary change by adding variation to the gene pool. The powerful urge to pass our genes on to the next generation has likely changed the face of human culture in ways we're only beginning to understand.
Is Love in Our DNA? Is Love in Our DNA?
Did evolution shape your taste in a mate? Take our poll.
Sex and the Single Guppy Sex and the Single Guppy
Learn how exhibitionism has an evolutionary payoff.
(Shockwave required)
The Mating Game The Mating Game
Help our contestants find the perfect date.
(Flash required)
The Advantage of Sex The Advantage of Sex
Why did sex evolve? The likely answers may surprise you.
  Questions about evolution?
Check out the Evolution FAQ.

Show 5: Why Sex?

Preview: QuickTime or RealPlayer
Buy the Video (entire series)

Help television evolve.
Make a pledge to your PBS station.
Videos Web Activities Site Guide About the Project FAQ Glossary Site Map Feedback Help Shop