Physicist Stephen Hawking, speaking at the Cedars-Sinai Medical Center in Los Angeles, said if humans don't migrate from the planet Earth to colonize other planets, they'll face extinction in 1,000 years. So, phew, we're good, guys. We've got like 900-plus years to just sit on this. That's a relief. [RT]
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.