MENSA members love PopSci. Enough to include PopSci.com in their annual list of the organization's members' top 50 favorite sites. Thanks, geniuses! Consider us thrilled and humbled. Check out their full list here.
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.