Everyone wants to go, to where they want go, fast right? That’s why people walk a straight line in lieu of zigzags. A straight line may be the shortest distance between two points, but it isn't necessarily the fastest path to follow. That's true when terrain is not level, and now researchers have created a mathematical model showing that a zigzag line provides the easiest way for people to go up or down slopes. So the next time you want to go to a place fast, think twice before walking a straight line!
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