5611 Views • Created 11 years ago By Veritasium • Updated about a year ago

Created By Veritasium • Updated about a year ago

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World's Roundest Object!

Origin Entry: World's Roundest Object!
Notes

Obligatory:

Description

The world's roundest object helps solve the longest running problem in measurement -- how to define the kilogram. A kilogram isn't what it used to be. Literally. The original name for it was the 'grave', proposed in 1793 but it fell victim to the French Revolution like its creator, Lavoisier.

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