The following excerpt was taken from “Ziggys Pocket Fun Book”.
Galileo Galilei was one of the first scientists to investigate the mysteries of gravity. He used to climb the Leaning Tower Of Pisa in Italy and drop things on to the public square below. He proved that objects of different weights fall at the same speed. Gravity makes falling objects accelerate at a constant speed of 9 metres per second.Galileo & Gravity