[Exorus18]

> The amount of soil excavated is over 10 cubic kilometers, equivalent to 4,000 great pyramids of Giza ...

> he mounds are extremely old--up to 4,000 years

Soo they can build 1 Pyramid of Giza per year ? :D

[dmos62]

Maybe faster. Their "building" capacity might have been growing with time.

[beached_whale]

I feel like this could be the prelude to a high school math question on exponential growth.

[MisterTea]

> Soo they can build 1 Pyramid of Giza per year ? :D

Depends if they unionize or not. (ducks)