Sooty Birds Share Dirt on Air Pollution [60 Second Specimens]

Every specimen has a story; these dirty birds helped scientists answer questions about levels of air pollution in the United States over a period of 135 years.

Sources/Articles:

Bird specimens track 135 years of atmospheric black carbon and environmental policy.

The Dirty Secrets Saved in Dead Birds' Feathers -- New York Times

'Sooty birds' reveal hidden US air pollution -- BBC

Dirty birds show just how catastrophic air pollution used to be -- Washington Post

Thanks to Ben Marks and Shane DuBay for their help with this video! 

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