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by msimpson 3268 days ago
I always get a kick out of this:

https://upload.wikimedia.org/wikipedia/commons/thumb/c/c9/Pr...
2 comments
pscarey 3268 days ago
It seems you've found the source of the obesity crisis!
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hsod 3268 days ago
context?
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msimpson 3268 days ago
It's how the mass of the International Prototype Kilogram and its copies have drifted over time:

http://www.bipm.org/en/bipm/mass/ipk/ (verifications tab)

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