The author of The Clock and the Camshaft: And Other Medieval Inventions We Still Can't Live Without, John Farrell talks about how things we use today were invented in the middle ages.
Shelley Irwin is the host and producer for The Shelley Irwin Show, a news magazine talk-show format on the local NPR affiliate Monday through Friday. The show, broadcast at 9 a.m., features a wide variety of local and national news makers, plus special features.