In her latest rollicking foray into taboo, icky and under-appreciated aspects of the human body, 2013’s “Gulp: Adventures on the Alimentary Canal,” Mary Roach takes readers on a wild ride down the alimentary canal and zips off in whatever direction her ardor for research and irrepressible instinct for the wonderfully weird lead her. It’s the latest in a long line of New York Times bestsellers that includes “Packing for Mars: The Curious Science of Life in the Void” (2010), “Bonk: The Curious Coupling of Science and Sex” (2008) and “Spook: Science Tackles the Afterlife” (2005). Her approach is grounded in science, but with a fascination with what we may find disgusting and the horrifying things we do to ourselves. For her University Lectures appearance, Roach will share the stage with SU biology professor Sandra Hewett for a conversational dialogue. Co-sponsored in cooperation with the College of Visual and Performing Arts and the College of Engineering & Computer Science.