Who was Isaac Newton and why was his laws of motion correct

He was probably the greatest physicist who ever lived. And he was also a very great mathematician. The three greatest physicists who ever lived were Archimedes, Newton and Einstein. The two greatest mathematicians were Newton and Gauss. Check him out at this link
http://en.wikipedia.org/wiki/Isaac_Newto…

oh my god you don't know who he is? he's my god thats who he is. and it was correct cause he was a genius

Who are you, and why is your grammar incorrect.