Shrinking Kilogram Bewilders Physicists

(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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<p><a href="http://www.physorg.com/news108836759.html">Shrinking Kilogram Bewilders Physicists</a></p> <p>(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.</p>