A true conservationist is a man who knows that the world is not given by his fathers, but borrowed from his children.

- John James Audubon

National Geographic Fellow and journalist Paul Salopek has set out on a decade-long mission: a 21,000-mile odyssey to retrace the footsteps of our ancestors' migration.

Two years behind schedule—and contented in that—these are his lessons so far. (more…)

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