Francis said, "Sir Isaac Newton was born on 25 December 1642 and died 20 March 1727 if you use the Julian calendar, which was used during his lifetime. If you use the gregorian calendar he was born on 4 January 1643 and died on 31 March 1727. Newton was an English physicist, mathematician, astronomer, philosopher, and alchemist. However, he was never interested in physics or math, he actually did the work in order to make a living! He actually invented Calculus one day after being stucked on his dorm room when he was 24 yrs old. He had been quarantined on campus all summer."