On the Edge, Timbuktu, Part 2

Radio Expeditions: Researcher Heads to Sahara to Study Vanishing Cultures

An ethnobotanist travels into the Sahara to document the vanishing customs of a desert people. In the second of a four-part National Geographic Radio Expedition, NPR's Alex Chadwick follows Wade Davis to Timbuktu, once a medieval intellectual center and a major center for trade.

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