Apparently 14,800 nail-gun accidents occur each year. Who knew? We can't seem to tear our eyes from the ponderable X-rays posted on thisoldhouse.com. Check it out while we mull over the question: just how did that nail get into this part of the head?—Abby Seiff
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.