A small workshop of charts and visual experiments by Marc Parrish — the interactive companions to things I write. Hover, click, explore.
Every measured day of air quality in 29 US cities, one tile per day, from 1976 to today. The Clean Air Act stops being a statistic and becomes something you can see: the color drains out of the grid. Pick a city from the map, or watch Los Angeles lose its purple summers.
→A chord diagram of every World Cup squad from 1982 to 2026, showing the region of the club each player actually played for. Watch the ribbons pour into Europe — and see how the 48-team 2026 field spreads wider than ever.