Source: NOVA: "Galileo's Battle for the Heavens" This resource can be found on the NOVA: "Galileo's Battle for the Heavens" Web site. The motion of objects fascinated Galileo throughout his life. When ...

It's a legendary experiment: Young Galileo, perched atop the Leaning Tower of Pisa, drops cannonballs of different weights to see if all objects fall at the same rate. It's a story that's easy to ...

Add Yahoo as a preferred source to see more of our stories on Google. Galileo, holding two balls, about to perform his legendary experiment. Hulton Archive/Stringer via Getty Images If you drop a ...