Everyone loves the deep space probe Voyager. Heather Wilkinson likes it so much she commissioned this piece. Voyager 1 is now the furthest human-made object from Earth and on its way out of the solar system. Voyager 2 isn't far behind.
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.