Along with supraglacial canyons and streams, melting ice causes supraglacial lakes like this one. This particular lake is about three-quarters of a mile in diameter. Melt lakes are connected to a feature known as a Moulin, a conduit that drains the water through many hundreds of feet to the ice sheet’s bed.
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.