A Milestone in Time Keeping

See allHide authors and affiliations

Science  28 Mar 2008:
Vol. 319, Issue 5871, pp. 1768-1769
DOI: 10.1126/science.1155948

You are currently viewing the summary.

View Full Text


Researchers have made atomic clocks so precise that effects of general relativity are on the verge of complicating the concept of keeping time.