Nazi Germany had no hope of making an atomic bomb, uranium cubes reveal - Science | AAAS

Scientists have reached a major milestone in the quest to build an entirely new kind of clock. After decades of research, a team in Vienna has developed the world's first self-stabilizing nuclear clock, a device that could eventually measure time with far greater precision than today's most advanced atomic clocks. Unlike earlier prototypes, the new nuclear clock can maintain its own stability without depending on a conventional atomic clock. Researchers have demonstrated that it can operate steadily for more than 24 hours without intervention.

Physicists have used radioactive lutetium to create what they say is the most accurate atomic clock ever, keeping time perfectly up to 19 decimal places.