Skin cancer comes from the sun. But so do many good things, according to author Rowan Jacobsen. Jacobsen talks with EconTalk's Russ Roberts about the health benefits of sunshine and makes the case for prudent sun exposure. Topics discussed include the "heliotherapy" movement that peaked in the early 1900s in response to rickets and tuberculosis, why diagnosing skin cancer is on the rise, and why yesterday's sunscreens may have done more harm than good.