The law of motion and the law of universal gravitation were not discovered by a single person. Instead, they were developed over centuries by many brilliant minds. Here's a breakdown:

Laws of Motion:

* Ancient Greeks: Philosophers like Aristotle laid the groundwork by observing motion and trying to explain it. However, their explanations were often based on intuition rather than experimentation.

* Galileo Galilei (1564-1642): Considered the father of modern physics, Galileo made crucial advancements through his experiments and observations. He challenged Aristotle's ideas and formulated the concept of inertia, showing that objects at rest tend to stay at rest and objects in motion tend to stay in motion.

* Isaac Newton (1643-1727): Built upon Galileo's work, Newton formulated the three laws of motion that we use today:

* First Law (Inertia): An object at rest will remain at rest, and an object in motion will remain in motion at a constant speed and direction, unless acted upon by a net external force.

* Second Law: The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.

* Third Law: For every action, there is an equal and opposite reaction.

Law of Universal Gravitation:

* Isaac Newton: Newton is credited with the discovery of the law of universal gravitation. He observed the motion of the planets and the moon and realized that a force must be acting on them, keeping them in their orbits. He formulated the law, which states that every particle in the Universe attracts every other particle with a force that is proportional to the product of their masses and inversely proportional to the square of the distance between their centers.

So, while Isaac Newton is often recognized for both the laws of motion and gravitation, it's crucial to understand that he built upon the work of many previous thinkers and experimenters.