> For all we know, the middle is just air and crumpled-up old newspaper. I think this is the answer. I suspect the exhibit designers had a cool idea for a display, did a rough estimate of the area needed and then commissioned the exhibit builders to make the big metal-framed cube. Either they made an error in their calculation or the innate variability in the size of stacks of used bills threw it off. It's also possi…
What’s the point of disseminating the technical reasoning behind it? I think it’s better served to use this as an analogy of how the federal government handles money.
Non-snark: Because it's fun to theorize.