Tomorrow I’ll be on the radio show Science and Society at 4:20 PM EST. It’s my second time on the show. Last time around we talked about the past six million years of hominid evolution (podcast here). This time we’re hoping to cover just a bit more ground: the past 600 million years of vertebrate evolution. We’ll try to hit on the big innovations that our ancestors acquired after we parted ways with the squishy beasts–such as brains, bones, a smart immune system, and hands and feet. You can listen live here, and the