Once considered an oddity of quantum physics, time crystals could be a good building block for accurate clocks and sensors, ...

The "Clock of the Long Now," which will tell time for the next 10,000 years, has cost $42 million to build so far. The huge mechanical clock ticks once per year and chimes once per millennium. Jeff ...

What if you could build a clock that would last for 10,000 years? A clock that would tick only once a year, bong once a century, and cuckoo once a millennium? A clock that would be a symbol of ...