Bright Ideas with Kristi Curry Rogers Bright Ideas host Stephen Smith talks Titanosauria with dinosaur expert Kristi Curry Rogers. She's a vertebrate paleontologist who conducts field research in Montana, Madagascar, and Zimbabwe and teaches at Macalester College in St. Paul. They talk about dinosaur bones, why some of sauropods got smaller as they evolved and how she reconstructs the lives of these long extinct creatures.12:00 p.m.