Finding quantum lines of desire
St. Louis MO (SPX) Aug 01, 2014 - Groundskeepers and landscapers hate them, but there is no fighting them. Called desire paths, social trails or goat tracks, they are the unofficial shortcuts people create between two locations when the purpose-built path doesn't take them where they want to go. There's a similar concept in classical physics called the "path of least action." If you throw a softball to a friend, the ball t ... more
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