High-capacity SD cards are the black holes of digital photo libraries. Eight gigs of storage means months and months of card filling, and (about) zero card emptying. In fact, we've become so used to SD cards that we're now finding ways for our physical prints (yes, people still have those) to live in one too.
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.