The Evolution of Beauty

Sally Kohn: I feel like this conversation has been a long time coming. Tat's been beent eight or nine years since a ornithology class on science hilliat yale and new haven. And am i wanted to talk a little bit about the research that i remember you doing then, and that obviously you have continued to do in recent books. But to really maybe begin by talking through the question of what you call honest signalling, and why you feel that honest signalling is not an adequate or accurate way of understanding a evolution or really, sexual selection.