Want to experience all the travails of being an astronaut with none of the glory? Now's your chance! The European Space Agency is seeking healthy, psychologically-stable test subjects to make a mock trip to Mars.
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.