Scientists Just Redefined the Kilogram (HBO), VICE News May 21, 2019

First published at 23:58 UTC on May 21st, 2019.

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Scientists Just Redefined the Kilogram (HBO)
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VICE News
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Published on May 21, 2019

For the last 129 years, the kilogram has been defined by a shiny hunk of metal called the International Prototype. It’s the thing against whic...

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