This week, we're learning about some of the most fortunate accidents and fascinating personalities in the history of science. We'll talk to astrophysicist and author Mario Livio about his book "Brilliant Blunders: From Darwin to Einstein - Colossal Mistakes by Great Scientists That Changed Our Understanding of Life and the Universe." And we'll talk to historian W. Bernard Carlson about his book "Tesla: Inventor of the Electrical Age."