Scientists are exploring a new type of optical atomic clock based on ytterbium-173 ions that could help define the future standard for measuring time.

DST continues to spark debate as Americans remain divided over whether to keep changing their clocks each year.

When do clocks change? Daylight saving time ends at 2 a.m. on Sunday, Nov. 2, as clocks fall back one hour. It will mean most people in the U.S. and Canada gain an extra hour of sleep as standard time ...