April 23rd, 2010 | Peter Scott

The rapid expansion of Walmart and Sam’s Club since the early 60’s has been a phenomenon. This compelling time-based info-map by Flowing Data helps explain (or perhaps mirrors?) the ongoing decline of small towns everywhere as the country gets subsumed by the big box/power centre invasion. Notice how growth starts slowly at first, and then accelerates greatly as more stores are added. Truly virus-like.