According to the always entertaining Vsauce, this is the volume that the entire human population would take if you put everyone on a pile in the Grand Canyon. We are just a bunch of ants, yet we have managed to transform the entire landscape of Earth.*
* Even if you took all of humanity across all the ages—an estimated 106 billion—the piles—about 15 of these—wouldn't cover the Grand Canyon. Not even a significant fraction.
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