So, the world’s most mysterious UAV is set to return to Earth after spending nearly eight months in space where it did lord only knows what. Courtesy of the LA Times: The X-37, an unmanned spacecraft that resembles a miniature version of the space shuttle, is set to land at Vandenberg Air Force Base as early as this week — more than seven months after it was launched into orbit. The Air Force, which has been developing the X-37 pilotless space plane, has kept the ultimate purpose of the program hush-hush. It was launched April 22 from Cape Canaveral, Fla....