Re: Sad case of science ignoring the evidence
"somehow the various copies of the kilogram made over the years, with the best equipment of the time, ended up being different to each other"
I'm somewhat confused by the graph showing "Le Grand K" mass changing over time, together with the mass change of all the copy Ks. After all, 1kg was BY DEFINITION the mass of "Le Grand K", so if the other copy masses changed relative to it, I would have to say that teh other cylinders were gaining or losing mass.
Of course I understand that it's possible that a physical object can have very slight mass gains or losses... but if I measure K at 1kg, then 10 years later I find it weighs 9.9999kg or 10.00001kg, how can I make the claim that "Le Grand K" has lost or gained mass rather than that my balance is no longer well calibrated / my copy cylinder has gained/lost mass?