Shedding light on dark energy
AMUNDSEN-SCOTT STATION, Antarctica -- Anywhere else it would be a big telescope, as high as a 7-story building, with a main mirror measuring 32 feet wide. But at the South Pole, it seems especially large, looming over a barren plain of ice that gets colder than anywhere else on the planet.
Scientists built the instrument at the end of the world to search for clues that might identify the most powerful, plentiful but elusive substance in the universe -- dark energy.
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