Mike Bostock's visualizations are glorious. This gives me lots of ideas for visualizing temporal variability across space. I can't embed this here, but I recommend you check it out.
They say: We published a more serious graphic today on drought’s effect on crops, but this was a fun animation we made to sanity-check parsing drought data. NOAA publishes monthly values for the Palmer Drought Severity Index going all the way back to 1895! Dark purple represents extreme drought, while dark green represents extreme moisture. In effect, this is a crazy electric version of Haeyoun Park and Kevin Quealy’s graphic, Drought’s Footprint.