Just how close can we get to our closest primate relatives? That's the question at the heart of our show Lucy -- a question that we try to answer by getting to know a chimp named Lucy, and a bonobo named Kanzi.
If you've listened to the show, you'll be eager to see the photo Jad mentions of Janis Carter hugging Lucy -- it's in the slideshow below, along with some other powerful shots of Lucy. Plus, take a look at a video of Kanzi using the "symbol keyboard," or lexigram, that Soren describes in the episode.
Slideshow produced by Sharon Shattuck.