Due to some unexpected complications, we have temporarily removed the recently implemented 1% commission on PPX trades. We're working on developing a system that simultaneously satisfies the needs of our traders and the integrity of the market's prediction data. Many have come forth with ideas in the PPX forums—thanks to all there for the input. We'll keep you posted of any more developments right here.
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.