Blitzortung is a community of volunteers who install inexpensive lightning sensors and transmit their data to a central server. In return, those who run the sensors have access to the network’s data. The map that runs on the site shows the data in near real-time, providing a view of lightning strikes around the world. Pretty neat that this exists.
Real-time lightning map
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Mapping the Spread of Obesity
A look at the rise for each state over three decades, for men and women.