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https://anthrocode.com/2015/02/07/manic-arousal-of-an-entire-city-during-the-super-bowl-as-told-through-heart-rate-in-1-chart-venturebeat-business-by-gregory-ferenstein/
Manic arousal of an entire city during the Super Bowl, as told through heart rate (in 1 chart) | VentureBeat | Business | by Gregory Ferenstein