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 a map of your route would reveal �you are doomed to walk in circles.
Source: http://www.npr.org/blogs/krulwich/2010/11/03/131050832/a-mystery-why-can-t-we-walk-straight?ft=1&f=100
Kit Bond Lamar Alexander Lindsey Graham Lisa Murkowski Maria Cantwell
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