Sex at Dawn

Exploring the evolutionary origins of modern sexuality

Why is Sex Such a Problem?

My recent TED talk: Five minutes of Intense Sperm Competition.

Find a Therapist

Search for a mental health professional near you.

I've tried to embed my recent TED talk (mini) here, but PT's system seems to have some trouble with embedded vids. But whether or not the vid appears below, if you are interested in seeing me discuss some of the evidence for sperm competition in the human past in greater depth at the big TED event next year, please go to the original TED page here, and say so in the comments section there. If there are enough enthusiastic comments on their site, they're more likely to invite me to the main TED gig. Thanks.


Christopher Ryan, Ph.D., is co-author of Sex at Dawn: The Prehistoric Origins of Modern Sexuality (HarperCollins 2010).


Subscribe to Sex at Dawn

Current Issue

Just Say It

When and how should we open up to loved ones?