There are currently 114,000 people waiting for organ transplants in the U.S., and roughly 7,000 of them die every year while awaiting a donor organ to become available. Meanwhile, there are 161 million Americans on Facebook. That math must have seemed pretty simple to Mark Zuckerberg and company at Facebook HQ, where the team has just added organ donation status to its users’ profiles.
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.