Comic-book science: The St. Paul (Minn.) Pioneer Press talks with University of Minnesota physics professor James Kakalios, who has taught a seminar called "The Physics of Superheroes," about how Spider-Man's powers might really work:
 
"I'm not so sure how real spiders do it, but geckos can climb up walls and climb across ceilings. They have literally millions of tiny little filaments on the ends of their paws, their hands. These filaments use electrostatic fluctuations, basically static cling, to adhere."