Best-selling gross-out science writer Mary Roach, whose popular nonfiction books Spook and Stiff covered ideas about the afterlife and the physical process of postmortem decay, has a new book out. In Gulp: Adventures on the Alimentary Canal, the Oakland-based author covers the digestive process from saliva to anus. Inspired by a conversation with a gastroenterologist, Roach set out to discover all she could from experts on subjects like food and flatulence.
Did you know that it's a myth that our mouths water when we smell food cooking? And there are actually two sets of nostrils humans smell through -- exhale through your nose while you're chewing or drinking, and the scent will travel through the back of your mouth to the top of your nasal cavity, as opposed to the usual method of smelling straight through the nose. Check out some highlights from her recent appearance on The Daily Show, and catch her in person at one of her two S.F. talks.
Mary Roach appears Wednesday, April 24 in conversation with Wired editor Adam Rogers at 6:30 p.m. at the Commonwealth Club, 595 Market St., S.F. General tickets are $12-$20. Call 597-6700 or visit