 This is CBS Eye on the World. I'm John Batchelor. Behind Black, 14 years, your subscriptions and donations are most welcome. Bob Zimmerman is here. We're going exploring, and we're going to start on planet Earth. Norway rats spread around the world by the adventurers of the 14th, 15th, and 16th century. Well, turns out there's been a development in Norway rat world. Bob, introduce us. Yes, this actually could be a major breakthrough for humans.