New record high-precision atomic clock
Before we tell about innovative nuclear astronomical clock from the French scientists based on the interference of laser beams that will keep up with just one second over 300 million years, as the record is beaten by American scientists.
Watch these are based on ytterbium atoms, and they will keep on for one second ... a billion years.
This high precision ytterbium clock is not for the sake of the record, but that it will put the hitherto impossible experiments in the field of general relativity.
Recall, the astronomical clock is adjusted biological clock.