MENLO PARK, California, Jan. 23 -- The SLAC National Accelerator Laboratory issued the following news release: * * * What is the universe made of? SLAC experts weigh in on the mysterious force that shapes our cosmic history * By Ali Sundermier * Dark energy drives the accelerating expansion of the universe, making up about 70% of its total mass-energy content. * The Dark Energy Survey (DES) was created to probe dark energy using a large optical survey, discovering dwarf galaxies and po  more