If the only standard for a Kilogram is the physical hunk of metal in Paris, then how do researchers know that it is losing mass? Perhaps it is the calibration of their scales drifting instead.
(Usually the tagline is enough, but in this case:) /sarc
14 posted on 02/14/2011 7:44:28 AM PST by Yo-Yo
(Is the /sarc tag really necessary?)