New atomic clock loses only one second every 300 billion years

A group of physicists has announced one of the highest performance atomic clocks ever made.

The instrument is said to measure time so precisely that it will only lose one second every 300 billion years, allowing for more exact measurements of gravitational waves, dark matter and other physics phenomena. A study based on the UW-Madison-led research was published Wednesday (Feb. 16) in the journal Nature.