It is hard to imagine what kind of world we would live in, if we did not know anything about gravity, properties of light, calculus, and the law of motion, which we consider as the most basic physic knowledge nowadays. Newton's discoveries indeed affect every aspect of our life. For his extraordinary contributions to math and science, he is generally regarded as the most original and influential theorist in history. In addition to his invention of the infinitesimal calculus and his establishment of a new theory of light and color, Newton transformed the structure of physical science with his three laws of motion and the law of universal gravitation. His accomplishments in mathematics, optics, and physics laid the foundations for modern science and revolutionized the world.

One of the most famous discoveries of Newton was the law of gravitation. The well-known picture for the gravity discovery shows Newton sitting under an apple tree observing an apple fall to the ground, and then he will instantly think of the formula for the law of gravitation.

In fact, to come up with the final form of the law of gravitation he had to go through many tireless experiments and calculations. Failures never stopped him trying. His persistent research efforts made him one of the greatest scientists in the world. When he had a good hunch, he worked diligently to get to the bottom of it. Isaac Newton's calculations revealed the motion of the universe, which revolutionized the whole world. Before his discovery, no one was able to reasonably explain why the planets stayed in their orbits. What held them up? Less that 50 years before Isaac Newton was born it was thought that the planets were held in place by an invisible shield. Isaac proved that they were held in place...