Eternal Clock

[Unbound]

4D Space-time crystals, 'nuff said.

"Researchers have now proposed an experimental design for a "space-time crystal" that would be able to keep time forever. This four-dimensional crystal would be similar to conventional 3D crystals, which are structures, like snowflakes and diamonds, whose atoms are arranged in repeating patterns. Whereas a diamond has a periodic structure in three dimensions, the space-time crystal would be periodic in time as well as space."

http://www.space.com/17769-eternal-clock...ystal.html