O/T Strontium atomic clock accurate to the second -- over 15 billion years --

[Ed Gould]

http://www.sciencedaily.com/releases/2015/04/150421132031.htm? 
utm_source=feedburner&utm_medium=email&utm_campaign=Feed: 
+sciencedaily/strange_science+(Strange+&+Offbeat+News+--+ScienceDaily)

(watch the wrap)

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