Real estate prices may be dropping domestically, but on the Moon they're still climbing. The investment bank UBS released a report concluding that lunar land prices have risen 40 percent since the start of 2007. The costs vary, with some sources claiming the high was $37 per acre in December 2005 and others saying a chunk of land will cost you as little as $56.
Whether anyone will really be able to lay claim to these plots one day is a big question, but apparently that hasn't stopped people from buying them. The king of space real estate, Dennis Hope, of the Lunar Embassy USA, claims to have sold 3.5 million parcels on the Moon and other planets.—Gregory Mone
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.