Ultraprecise atomic clocks put Einstein’s special relativity to the test
An experiment tested a foundational principle of physics known as Lorentz symmetry
![atomic clock](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2019/03/031319_ec_atomicclock_feat.jpg?fit=860%2C460&ssl=1)
WATCHING THE CLOCK Scientists monitored two atomic clocks for six months in order to test a tenet of Einstein’s special theory of relativity. Each clock, like the one shown, contained a single ion of ytterbium.
PTB