When the first monkey fell out of a tree.
Newton published his Law of Universal Gravitation in 1687, though certainly people before then knew about gravity in general... Hooke in particular had suggested that it fell off as the square of the distance some time in the 1660s.
on 1665
he discovered gravity he discovered gravity
Gravity was discovered in 1650 by Sir Isaac Newton.
Sir Isaac Newton is said to have discovered the concept of gravity in 1665 or 1666, when he observed an apple falling from a tree. This observation eventually led to his development of the law of universal gravitation.
newton discovered gravity.. he was curious to know the reason behind the falling apple from the tree
Isaac Newton discovered gravity with the help of an apple.
Isaac newton discovered the law of gravity.
Isaac Newton discovered gravity.
Gravity was discovered in 1650 by Sir Isaac newton.
gravity
It was discovered in 1898.
Isaac Newton