The theory of gravity is very, very old, in fact Plato was discussing it. However, it was Newton who formulated the theory of universal gravity, that the same "force" that causes things to fall to the floor keeps planets in orbit around the sun.
It is more correct to say that Newton invented the theory of gravitation, than to say that he discovered the theory. Gravity exists in nature, but the theory of gravity does not exist in nature, it is a human invention. You can only discover something that already exists, and the theory of gravity didn't exist until Newton invented it.
By having an apple fall on his head
Isaac newton
isaac newton
1687
Newton's Law of gravitation
George Henry Lepper has written: 'The generalized theory of gravitation versus the general theory of relativity' -- subject- s -: Gravitation, Relativity - Physics -
because no one believe him when he discover it
The attraction between masses.
1687
The General theory of relativity primarily applies to particles as they accelerate, particularly due to gravitation
Functinalism theory