A high volume skimming system skims oil from the Gulf of Mexico near Venice, La., April 28, 2010. Skimmers like these helped remove some of the oil leaking from the blown Macondo well last summer, after some 4.9 million barrels of oil spilled into the Gulf.
After the spill, Wendy Schmidt, wife of Google CEO Eric Schmidt and president of their family foundation, sponsored an X PRIZE Challenge to come up with a faster, more efficient way to separate oil from water.
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.