Newton's apple tree.

At the entrance to Trinity College, University of Cambridge, there is an apple tree that attracts a lot of attention from tourists. This is the world-famous Newton's apple tree. It was under this tree that Newton was hit by an apple, leading to his discovery of the law of universal gravitation. The apple tree is not large and is just like any other apple tree. However, because of Newton's first law, this apple tree has become famous and is seen as a symbol of the spirit of scientific exploration. It is a milestone in the history of science.