Eat your heart out Captain Kirk – tractor beam that uses SOUND can hold, move and even rotate objects without physical contact. We’ve all seen tractor beams in science fiction films from Star Trek to Star Wars to pull in smaller ships, but now a UK based team has developed an actual tractor beam that works. A sonic tractor beam Researchers from the Universities of Bristol and Sussex, in collaboration with Ultrahaptics, put together 64 miniature loudspeakers to create high-pitch…