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Mass of an iPad Air (470 g) is 2.5 x Mass of an iPhone 7 Plus smartphone (188 g)
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Estimate of population of Sumatran Elephant (2,600 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.