Black holes, wormholes, and cosmic strings - each of these phenomena has been proposed as a method for time travel, but none seem feasible, for (at least) one major reason. Although theoretically they could distort space-time, they all require an unthinkably gigantic amount of mass. Mallett, a U Conn Physics Professor for 30 years, considered an alternative to these time travel methods based on Einsteins famous relativity equation: E=mc2. Einstein showed that mass and energy are the same thing, said Mallett, who published his first research on time travel in 2000 in Physics Letters. The time machine weve designed uses light in the form of circulating lasers to warp or loop time instead of using massive objects. Mallett is designing a desktop-sized device that will test his time-warping theory. By arranging mirrors, Mallett can make a circulating light beam which should warp surrounding space. Because some subatomic particles have extremely short lifetimes, Mallett hopes that he will observe these particles to exist for a longer time than expected when placed in the vicinity of the circulating light beam. A longer lifetime means that the particles must have flowed through a time loop into the future. Say you have a cup of coffee and a spoon, Mallett explained to PhysOrg.com. The coffee is empty space, and the spoon is the circulating light beam. When you stir the coffee with the spoon, the coffee - or the empty space - gets twisted. Suppose you drop a sugar cube in the coffee. If empty space were twisting, youd be able to detect it by observing a subatomic particle moving around in the space.