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Try as you might, you can't walk in a straight line without a visible guide point, like the Sun or a star. You might think you're walking straight, but as NPR's Robert Krulwich reports, a map of your route would reveal you are doomed to walk in circles.

Channel: WATCH DOCUMENTARIES

Related tags: robert krulwich , benjamin arthur , national public radio , npr , krulwich wonders , science , animation , animation short , experiment , straight lines , walking in lines ,

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