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Mass of water in Lake Kariba (180 trillion kg) is 500 x Mass of all the humans on Earth (358 billion kg)
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Number of galaxies in the observable universe (100bn )
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.