Tim Walz first learned about geographic information systems, or GIS, as a high school geography teacher in the 1990s ...

As National Geographic reimagines its iconic headquarters for the 21st century, here’s a look back at its history as a base for both Cold War spies and the Society’s own Explorers.

The fellowship is named for Gilbert M. Grosvenor, chairman emeritus of the National Geographic Society, in recognition of his work supporting teachers and promoting geography education.

Tim Walz first learned about geographic information systems, or GIS, as a high school geography teacher in the 1990s ... After attending a National Geographic Summer Institute, Walz introduced ...