Paul Salopek has been out for a walk—a very long walk—since 2013. His route stretches from Ethiopia's Great Rift Valley to the very southern tip of South America, tracing the path of humanity from its African origins, across deserts and mountains.
PBS NewsHour's Hari Sreenivasan caught up with the two-time Pulitzer Prize-winning foreign correspondent in the former Soviet republic of Georgia to discuss his journey so far.
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