Proposed 4-dimensional crystal clock will keep perfect time even after…

Scientists say that a perpetual motion machine is physically impossible, but a research team at the University of California Berkeley has just outlined an idea that comes pretty damn close. By proposing a 4D "space-time crystal," the engineers have designed a device that would operate at its lowest quantum energy… » 9/25/12 6:50am 9/25/12 6:50am

Forget pirates. Navigate like a viking.

Vikings did a lot of navigating in their line of work. Those who didn't know how to use the sun to get exactly where they wanted to go would end up razing only sandcastles, pillaging only bird's nests, and setting fire only to their own beards. So when cloudy, foggy, gray days caused these intrepid seamen to tear the… » 2/03/11 12:30pm 2/03/11 12:30pm