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How Much Humanity Weighs

Hank gives us a summary of a strange new calculation, which estimates the total body mass of all the humans on earth.

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References:
http://www.biomedcentral.com/bmcpublichealth/
http://www.eurekalert.org/emb_releases/2012-06/bc-two061512.php
https://apps.who.int/infobase/Publicfiles/SuRF2.pdf

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