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DC Historic Preservation Office

Mapping D.C.'s Historic Buildings

It took the city’s office of historic preservation more than 15 years to make, covers 127,000 buildings, and it’s still not quite finished.

Photos
© Mustafah Abdulaziz/WWF-UK

The Global Water Crisis, in Pictures

The photographer Mustafah Abdelaziz documents sustainability and inequality across the world.

Videos
Great Big Story

The Public Librarians Who Serve as Human Google

The New York Public Library’s reference service still handles 30,000 calls a year.