Optical clock distribution is presented for the first time in an unmodified bulk CMOS chip. An H-tree distributes the signal using I-beam photonic waveguides operating at 780 nm, and avalanche ...

One of the biggest challenges in modern physics is uniting quantum mechanics and general relativity. A new experiment may finally provide some answers.

Electron beam method enables precise nanoscale carving and building of copper structures by Ashley Ritchie, Georgia Institute of Technology edited by Sadie Harley, reviewed by Andrew Zinin Editors ...

Climate change is a slow-moving disaster. We need graphics that capture both its pace and its impact.

In other words, timekeepers will subtract a single leap second to make sure the atomic clocks are in tune with the astronomical movement of our Solar System.

Can GPS function without an atomic clock? Learn how GPS receivers stay accurate using clever math, satellite timing, and error correction. #GPSExplained #AtomicClock ...

Scientists propose using quantum-entangled clocks to test how gravity affects quantum mechanics in curved spacetime.

Two days this summer have been unusually short, with the shortest expected on Aug. 5, leading global timekeepers to consider adding a negative leap second.

SECOND, THEY MAY NEED TO BE ADDED TO THE ATOMIC CLOCK IN A FEW YEARS. SO AS IT. GOES FASTER THAN YOU HAVE TO SPEED UP THE CLOCK, BECAUSE THAT MEANS TIME IS WINDING DOWN FASTER. WE’RE ALL ...

Earth is spinning faster this summer, making the days marginally shorter and attracting the attention of scientists and timekeepers.

Is the Earth spinning faster? Is July 22 the shortest day ever? Here's what to know about the Earth's rotation and why is today the shortest day.