It was 1687 when Issac Newton first published his PhilosophiƦ
Naturalis Principia Mathematica in which he
first
described his universal law of gravitationthe inverse square
law
that we are all taught in middle school science class. Nearly 230 years
passed before Newton's law was
dethroned by Albert Einstein's theory of general relativity, a
theory
of gravity that reconciled Newton's work with Einstein's own theory of
spec....

