On Tuesday, the biggest solar flare in four years erupted from the sun, sending a mass of charged particles hurtling towards Earth. NASA announced that it was an M-2 (medium-sized) flare and an S1-class (minor) radiation storm. The electromagnetic pulse it induced created amazing auroras, but it could also damage satellites and radio communications. What would happen with an even stronger, larger flare? Something terrible...Click here to see what a CME would do to Earth.
And click here to see the amazing video of this week's massive solar belch.
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.