Using a site that tracks dollar bills, a theoretical physicist noticed that our state boundaries are rather arbitrary, but that money tends to stay within new, more realistic boundaries.
To theoretical physicist Dirk Brockmann, the borders of the United States are out of date.
“Some are kind of arbitrary like New Mexico, Arizona: they’re just kind of drawn on the map,” says Brockmann. “Often, they no longer correlate with our behavior.”
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