This week we’re looking at science history, with two books about the passion and perseverance that drive the pursuit of scientific discovery. We’re joined by science writer Mark Anderson, to talk about his book The Day the World Discovered the Sun: An Extraordinary Story of Scientific Adventure and the Race to Track the Transit of Venus. And science writer Jessica Wapner returns to discuss her new book The Philadelphia Chromosome: A Mutant Gene and the Quest to Cure Cancer at the Genetic Level.