Most independent inventors don’t have bottomless bank accounts. To fund their dreams, many innovators are appealing to strangers on the Web for help. Kickstarter co-founder Yancey Strickler weighs in on this growing source of grassroots venture capital.
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.