This is one of the most inspiring stories we've ever seen: Claire Lomas of the U.K. was paralyzed from the chest down in a horse-riding accident five years ago. Yet today, she accomplished something difficult for anyone: she finished the London Marathon. It took 16 days and one impressive bionic exoskeleton, but she did it. Watch the video and try not to tear up a little, I dare you.
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.