Let’s talk a little bit about testosterone, shall we?Sure, it’s a loaded topic, tied up with what behaviors are supposedly “male.” But of course both men and women have it, and it seems to play a big role in the kind of people we wind up becoming.

Embryonic stem cells are certainly a loaded subject. They come with built-in controversy over how they are obtained – a human embryo is destroyed in the process.

Our senses tell us about the world, but they also reveal a lot about ourselves. On the latest installment of Clever Apes, we find that research into cochlear implants helps us understand how all hearing is really both mechanical and subjective, machine and mind.

Hey Clever Apes fans! We've selected a few highlights from our first six months and wrapped 'em all up in an hour long broadcast special.  Why do kids play with fire? What happens when robots and theater mix? And why do some people age so well?

Pain may be the most immediate and undeniable of human experiences. And yet it’s not obvious what it is, or where it comes from. Aristotle thought pain was basically an emotion, located in the heart.

When we heard there was a study about the connection between marital relations and chronic pain, we couldn't help but think of classic TV shows where marriages are stressed by back pain.

Gordon's pez: Tensor glyphs baffle a spouse, who calls Clever Apes for help. (Image courtesy of Gordon Kindlmann)"I heard about your show and thought immediately of my husband, Gordon Kindlmann, who is a professor at University of Chicago.

Malcolm MacIver with one of his weakly electric fish. He's colaborating on an art installation with Marlena Novak and Jay Alan Yim, called "Scale," opening in Europe.