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Length of the Blue Whale skeleton in London's Natural History Museum (25.2 m) is 200 x Length of a standard index card (127 mm)
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Forest in Comoros (2011) (30 km^2)
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.