Physicists are quietly rewriting the rulebook for how we might cross the gulf between stars, not by bolting bigger rockets to ...

Our caesium fountains are among only 12 worldwide. Meet the timekeepers who watch over them at the IST Metrology Division in New Delhi.

For much of history, we lived happily without clocks, content with a vague understanding of where we were in the day. How, and when, did this change? Take a look.

Multiple pallets of Dyson appliances, Nike shoes and Wahl hair clippers were among the recovered products, as well as merchandise linked to a range of retailers and manufacturers, including Amazon, ...

GPS accuracy relies on Einstein's relativity theories to correct satellite timing errors that would otherwise cause 6+ mile ...

Spacecraft navigation explained with radio tracking, optical systems, and autonomous methods that enable deep space ...

Thanks to Einstein’s relativity, time flows differently on Mars than on Earth. NIST scientists have now nailed down the ...