Newton's discovery of gravity when he saw an apple fall to the ground was an example of archetype inspiration. This event was known as the " Apple Incident " and was a milestone in modern physics. In 1665, Newton gave a speech at the Royal Society of England and proposed some theories about the motion of celestial bodies, including the law of universal gravitation. However, his original theory was not widely accepted because his theory involved some unsolved problems, such as why the orbit of the planet was oval, why gravity was not the only factor to explain the motion of celestial bodies, and so on. However, the Apple incident gave Newton a revelation. That year, Newton was patrolling his orchard when he saw an apple fall from a tree. After careful observation, he found that the speed at which the apple fell was proportional to its height and gravity. This observation made him realize that if the gravity on an object was proportional to its mass and inverse to its height, then the object would be subjected to a constant force that kept them at rest or moving in a straight line at a constant speed. Newton discovered this law by observing an apple falling to the ground and applied it to explain the motion of celestial bodies. This law became one of the most important laws in modern physics and was widely used in space exploration and weather prediction. Therefore, the apple incident became an example of Newton's discovery of the law of gravity.