General Atomics has been upping the ante on its 'Blitzer' railgun, named after the most dangerous of Santa's reindeer. GA's got a new, super aerodynamic dart for it that can travel four miles downrange after being fired at zero elevation and blowing through a 1/8" steel plate.

Does more engines equal more awesome? You bet it does. NASA's latest concept for their satellite launching system is getting fleshed out with some extra sources of thrust.