Reader and friend Dr. Mark sent a link to this visual from FlowingData. It's a dynamic presentation showing the growth of WalMart and Sam's Club, from a single store in Arkansas in 1962 to a retail giant. It's impressive. And it adds meaning to the term "exponential".
The final image reminded me of something I saw on Chartporn. Also an impressive outcome, but definitely not as much fun to watch as the FlowingData link. Thanks Dr. Mark.