It's important to note that the concept of gravity has been around for centuries, with philosophers and scientists pondering the reason objects fall to the ground.

However, Sir Isaac Newton is credited with defining the law of universal gravitation in the late 17th century. He was the first to formulate a mathematical description of gravity, explaining its universal nature and how it affects objects of different masses.

While Newton didn't "discover" gravity, he was the first to provide a comprehensive and quantifiable explanation for its behavior.