We saw a similar video of boundary development over the centuries before, but I like this one as a contrast to it. The first is really default-looking, whereas this one has a little bit of production value.
US boundary evolution
Projects by FlowingData See All →
Mapping the Most Common Races
Select one or more races for a quick comparison. Counties are colored by the most prevalent.
Unemployment in America, Mapped Over Time
Watch the regional changes across the country from 1990 to 2016.