Who Discovered that Gravity is a Universal force exerted by all objects in the Universe and When?
By the early seventeenth century, many forces had been identified: friction, gravity, air resistance, electrical, forces people exerted, etc. Newton’s mathematical concept of gravity was the first step in joining these seemingly different forces into a single, unified concept. An apple fell; people had weight; the moon orbited Earth, all for the same reason. Newton’s … Read more