15 Fastest Growing Megacities of the World
15 Fastest growing Megacities of the World. Source: http://www.statista.com/chart/1826/population-growth-in-the-worlds-megacities/
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Scale of the Universe.
There are many websites, that give you a very real sense of how small and large our universe is. They do a pretty good job at it too. Then, I stumbled on this site