Why do non-mathematicians need to know theoretical mathematics? The physicist Richard Feynman sat on a committee that investigated a NASA accident, and he knew why. If you know what a circle is, and you attend this talk, you'll know why. Bring a compass and a ruler (and a note pad), and you'll be able to participate in a hands-on demonstration.
Helen Moore graduated from the North Carolina School of Science and Math, and the University of North Carolina at Chapel Hill. She received her PH.D. in mathematics from the State University of New York in 1995, where she was a winner of a university-wide teaching award. She taught at Bowdion College in Main for three years before coming to Stanford University. Helen currently holds a lecturer position in the Stanford Math Department, and a National Science Foundation grant for her research that involves the mathematics of soap films. She has given more than 40 invited talks in four countries. She loves to play Ultimate frisbee and acoustic guitar.