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"I think therefore I am"
while stationed in Neuburg an der Donau, Germany, Descartes shut himself in a "stove" (some type of room specially heated for that purpose) to escape the cold. While within, he had three visions and that a divine spirit revealed to him a new philosophy. Upon exiting he had formulated analytical geometry and the idea of applying the mathematical method to philosophy.This basic truth, Descartes found quite soon: his famous "I think".[15] -
La Geometrie
La Géométrie was published in 1637 as an appendix to Discours de la méthode (Discourse on Method), written by René Descartes. In the Discourse, he presents his method for obtaining clarity on any subject. -
Rømer's determination of the speed of light
Rømer's determination of the speed of light was the demonstration in 1676 that light has a finite speed, and so doesn't travel instantaneously. The discovery is usually attributed to Danish astronomer Ole Rømer (1644–1710),[note 1] who was working at the Royal Observatory in Paris at the time. -
Sir Isaac Newton
Newton's Principia formulated the laws of motion and universal gravitation that dominated scientists' view of the physical universe for the next three centuries. It also demonstrated that the motion of objects on the Earth and that of celestial bodies could be described by the same principles. -
Albert Einstein E=mc2
This mass–energy relation states that the universal proportionality factor between equivalent amounts of energy and mass is equal to the speed of light squared.