May 23, 2003

Kenneth Walsh, Chief White House correspondent for U.S. News & World Report joins Todd to discuss the history of Air Force One. Walsh tells Todd about the president's airplane, along with some stories that show the different personalities of each president. They discuss how Air Force One has changed over the years, and how it has become a symbol of American power. Walsh is author of "Air Force One: A History of the Presidents and Their Planes."

Biologists who study crocodiles have always used the number of bumps found on their noses as a means of distinguishing between different species, but nobody ever knew the function of these black spots. Neuroscientist Daphne Soares decided to study the bumps, and she joins Todd to tell him what she found.

Robert Brier, an Egyptologist on the C.W. Post Campus of Long Island University, joins Todd to discuss the mummies in the catacombs under Palermo, Sicily. He explains how these mummies were created and dressed, then grouped by class and profession. His article about the catacombs of Palermo appears in the May/June issue of "Archaeology."