This Two-Acre Telescope Powers Science's Search for Dark Energy

For lack of a better word, the Robert C. Byrd Green Bank Telescope (GBT) is ginorgantic. (That's the evolved form of ginormous). At 17 million pounds, it is both the world's largest, most technologically-advanced single-dish radio telescope—and the single biggest land-based movable structure on the planet. »4/26/12 11:30am4/26/12 11:30am