To perform this experiment you need a needle, a piece of styrofoam and paper. Make a card as shown in the film. The center of gravity of the card is in place the support pages of the needle.
Then bring your hand to the cards carefully. After a while the card begins to rotate. Paper insult is always in the same direction.
Explanation: The human body emits heat, which turns the paper. The center of the hand is always warmer than fingers, so card is always an insult in the same direction.
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