Number 256 (Story #2), January 26, 1996 by Phillip F. Schewe and Ben Stein SPACEBORNE PARTICLE PHYSICS . Major new accelerators in the U.S. are too costly, so some particle physicists hope to shift their operations into space. SLAC has proposed building the $100- million Gamma Large Array Space Telescope (GLAST), which would view gamma rays with stacks of silicon microstrip detectors, some 50-100 times more sensitive than the detectors used in the present Gamma Ray Observatory. Meanwhile, Sam Ting of MIT plans to build to the Alpha Magnetic Spectrometer (AMS), a $20-million device to be mounted on Space Station Alpha. AMS would use a powerful permanent magnet to sort antiparticles from particles, the goal being to search for antimatter in the universe and for the decay of dark matter particles (Science, 12 January 1996.)