On Cool Science Radio , Professor Vaclav Smil joins the show to discuss his new book, NUMBERS DON’T LIE: 71 Stories to Help Us Understand the Modern World. Vaclav Smil's mission is to make facts matter. An environmental scientist, policy analyst, and a hugely prolific author, Smil is Bill Gates' go-to guy for making sense of our world. In his book, Smil answers questions such as: What's worse for the environment--your car or your phone? How much do the world's cows weigh (and what does it matter