Sir Isaac Newton (16421727), mathematician and physicist, was one of the foremost scientific
intellects of all time. A famous story suggests that
Newton discovered the laws of gravity by watching an apple fall from a tree, although it
is not certain that this is true.
To get a feel for his observation,
click on the
tree.

Among many other
discoveries, Newton helped define the laws of planetary motion, cofounded the field of
calculus, and explained laws of light and color. He was knighted in 1705. 


. 
Newton may have
inspired Albert Einstein
who said in 1922: "If a person falls freely he will not feel his own
weight".
Listen to Einstein, who in his own voice explains his
famous formula
E = mc˛. 
