9 febrero 2015
Two cryogenically cooled optical lattice clocks that can be synchronized to a tremendous one part in 2.0 x 10-18–meaning that they would only go out of synch by a second in 16 billion years. This is nearly 1,000 times more precise than the current international timekeeping standard cesium atomic clock.
http://feeds.sciencedaily.com/~r/sciencedaily/~3/yOAjBwWFNFM/150209113042.htm
