You are nothing. In fact, 99.9999999999999 percent of everything is made up of nothing. But despite that empty feeling you have, there is something—atoms, sure; the Higgs boson particle, likely—and the sum of those things coalesces into our beautiful universe. How everything became as it is—built up from zilch—is the basis of theoretical physicist Lawrence M. Krauss’ new book, A Universe From Nothing: Why There Is Something Rather Than Nothing. The roots of the book sprout from a lecture the Arizona State University professor gave in 2009; it became a YouTube hit due to Krauss’ brilliant way of handling difficult cosmological ideas with clear explanations and casual humor. “Forget Jesus,” Krauss said. “The stars died so you could be born.” Krauss lectures at 6:45 p.m. at the National Museum of Natural History’s Baird Auditorium, 10th Street and Constitution Avenue NW. $25. residentassociates.org. (202) 633-3030.