Surface tension creates a glassy, smooth layer of water over U.S. swimmer Tyler Clary the instant before he surfaces as he competes in the backstroke. Surface tension arises from intermolecular forces between water molecules.
Daredevils are not the only ones using bridges for fun: musicians are getting in on the act too. Di Mainstone and her team at Queen Mary University of London are attaching people clad in a special body suit to architectural structures with strings that tap into a building's vibrations and can be played like an electronic harp.
Mainstone was inspired by the Brooklyn Bridge while living in New York. "I wondered whether there was a way to capture the vibrations that go through cables triggered by walking, traffic and wind," she says. Since the vibrations aren't audible, they need to be transformed into a form we can hear.