The concept of gravity has been around for a few thousand years. But the person most famous and often credited for the discovery of this phenomenon is Isaac Newton.
The story of an apple falling from a tree is a famous story associated with Newton and the discovery of gravity.
The universal law of gravitation was also formulated by Newton, which states that any two particles will experience an attractive force towards each other. The magnitude of this force is directly related to the mass of the particles and the distance between them.