Eels aren't the only creatures that can deliver a painful zap of electricity. In fact, not all of them are even marine animals. Here are some others.
Deep-sea microbes: At the bottom of the ocean, these “living batteries” move electrons across the metals on which they live.
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.