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Mass of Tuba (10 kg) is 4 thousand x Mass of a USA penny (1c piece) (2.5 g)
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Estimated world population of Sumatran Orangutan (7,300 individuals)
If this was a standard unit ...
Yes, there's now a book based on these numbers. Oxford University Press: July 2018.
Click here to learn more about it.
Click here for Podcast: Andrew Elliott interviewed for New Books Network.