Title: Opcional

Text: Sir Isaac was strolling through a Lincolnshire garden with a friend and they drank tea beneath the shade of an apple tree. As he looked on, Sir Isaac realized that no matter what side of the world the tree might grow, its falling apple will always tumble towards the Earth. Never sideways, never upwards. There must be a power drawing the apple inexorably towards the Earth's center. And thus, Newton defined his third law. Cada párrafo será una prueba.

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