On the 21st: Sue, the world-famous T. rex that greets visitors of the Field Museum in Chicago, is soon moving to make room for a gigantic, new plant-eating dinosaur. We discussed the upcoming changes with Field Museum paleontologist Bill Simpson. Plus, to prepare for the Labor Day holiday and lots of weekend grilling, we heard from some of the state's top BBQ experts, including chef Benjamin Grice from The Humble Hog and Pat Burke from Pat’s BBQ.

Guest: Scott D. Sampson, Ph.D.

In the past twenty-five years, more "new" species of dinosaur were discovered and named than in all prior history. Today on Focus, we'll talk to leading expert Scott D. Sampson about the story of the dinosaurs from their origin to their sudden demise. We'll also discuss how further knowledge about the dinosaurs gives us a better view of the entire natural world.

Guest: Steven Jay Gould.

The Burgess Shale is a small limestone quarry in the Canadian Rockies. Seemingly unobtrusive, it in fact holds the remains of a 530-million-year-old sea and all the creatures that dwelled within it. Paleontologist Stephen Jay Gould joins Focus today to talk about the Burgess Shale and what it can tell us about evolution and natural history.

Guest: Donald Johanson.

The oldest hominid skeleton discovered to date, nicknamed "Lucy" by paleontologists, was discovered by paleoanthropologist Donald Johanson in 1973. He joins Focus today to talk about his book Lucy's Child, in which he details his work in the field at the time of the excavation, the controversies surrounding the discovery, and how the spectacular find may contribute to further knowledge of human origins.