You know why people have eyes in the front?
Because they have to move forward to see the landscape in the distance. If you had eyes in back all you could see is your home town getting farther away; you can't move forward like that. If your eyes are in front what you see in the distance keeps getting closer. That's what lets people move forward.
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If your eyes are in the back, wouldn't they still be in front? I think that most people would walk in the direction that they could see in