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The world's roundest object

A look at how the roundest object can help us to define the humble kilogram.


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Recent comments on this video
Comment icon #1 Posted by Vilasarius on 12 April, 2018, 12:41
If that was earth, "the highest mountain and lowest valley would be about 40M apart." That is impressive. Great post UM-Bot.
Comment icon #2 Posted by cal1970 on 13 April, 2018, 8:06
very interesting

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