By Sarah Fecht
Posted 10.28.2011 at 3:00 pm 8 Comments
For the same reason cats fluff up when they’re threatened. “The general principle is, if you are going to be attacked, try to look as big as you can,” says David Huron, a musicologist at Ohio State University. People don’t have as much hair as cats, but goose bumps are a holdover from when we were furrier.
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.