On July 2, 2007, Scott Showalter climbed into a manure pit on his Virginia farm to clear a blocked pipe. Moments later, he fainted and died. An employee of his went in to save him but was quickly overcome as well. One by one, his two daughters and wife followed, only to die trying to save the people who went before them.
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.