You might have too many nines there. Based on its surface area, that's 0.51 square km or 0.15 square km of the land area. Sure, the density of "stuff" is very

You might have too many nines there. Based on its surface area, that's 0.51 square km or 0.15 square km of the land area. Sure, the density of "stuff" is very irregular. But I can look out my window at more Earth than that right now. I agree with your point that there's enough on Earth for at least 1000 human lifetimes, and it's pretty fractal in nature.