Atomic clock will keep precise time for 15 billion years

RIGHT ON TIME A new atomic clock contains two ultrasensitive thermometers (center) that enable scientists to account for heat-caused fluctuations that limit the clock’s precision.
Marti/JILA
RIGHT ON TIME A new atomic clock contains two ultrasensitive thermometers (center) that enable scientists to account for heat-caused fluctuations that limit the clock’s precision.
Marti/JILA