Shrinking Kilogram Bewilders PhysicistsSeptember 12, 2007 By JAMEY KEATEN, Associated Press Writer in Physics / General Physics
(AP) -- A kilogram just isn't what it used to be. The 118-year-old cylinder that is the international prototype for the metric mass, kept tightly under lock and key outside Paris, is mysteriously losing weight - if ever so slightly.
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"Shrinking Kilogram Bewilders Physicists" September 12, 2007 http://phys.org/news/2007-09-kilogram-bewilders-physicists.html