IF TIME waits for no man, then neither does human ingenuity in measuring its passing.
Throughout history, more stable and accurate clocks have led to advances in communications and navigation. Now a clock 1000 times more accurate than any of its predecessors has set another benchmark, and could even be used to create a more precise definition of how long a second is.
The new clock is a variant on the atomic clocks that appeared in the 1950s. Atomic clocks usually work by measuring the frequency at which atoms resonate. For instance, the outer electrons of a caesium-133 atom resonate…
