A Colorado scientist who studies black holes says the recent discovery of gravitational waves -- ripples in space-time -- may be the most important discovery of her lifetime. Then, audiences feel a connection to the character of Sheriff Walt Longmire, whether it's in the mystery novels by Craig Johnson, or on the small screen in the Netflix series "Longmire." Johnson, who lives on a ranch in Wyoming, tells us some of his best ideas come to him when he's shoveling out the barn.