By synthesizing the antimatter particle antihydrogen, physicists will have the ability to create a more accurate picture and explanation of the universe. "Would antimatter fall down -- or fall up?," asks physics major Guy Geyer '13. "If we could trap antihydrogen for a longer length of time, we could test the gravitational effects of the particle. This would certainly be what scientists aim to do in the end." Geyer, who studies antihydrogen at Wesleyan, received honorable mention for the 2011-12 Barry Goldwater Scholarship. He competed with 1,095 mathematics, science, and engineering students nationwide for the award. Geyer began his antihydrogen…