The Defense Advanced Research Projects Agency is exploring the potential for advancing ground- and space-based telescope technology that one official says could ultimately be leveraged to improve the military's battlespace awareness. At the heart of the early-stage review, detailed in a request for information the agency recently published , is the liquid mirror telescope. Cheaper to manufacture than traditional telescopes that rely on solid glass mirrors, LMTs focus light through the constant rotation of a bowl of reflective liquid, such...