The passage of time is fundamental to the theory of relativity: how you realize it, how you calculate it, and what influences it,” said Bijunath Patla, a physicist at the National Institute of ...

Clocks on Mars tick faster by about 477 microseconds each Earth day, a new study suggests. This difference is significantly ...

A windstorm in Colorado caused a power outage at NIST, disrupting US official timekeeping and causing a 4.8-microsecond lag. Although atomic clocks ran on battery, a backup generator failure affected ...