Summary: Can genetics explain some of history's greatest mysteries? Sam Kean's latest book is called "The Violinist's Thumb and Other Lost Tales of Love, War and Genius Written in our Genetic Code." He unravels our DNA to try to explain Beethoven's death, why the human race almost went extinct, and even why crazy cat ladies love their feline friends. Kean spoke at Seattle's Town Hall on July 19, 2012.
