The town of Pisa wants a new bell tower, and pixel Galileo Galilei has offered to help, mainly because he needs somewhere tall to drop cannonballs from. The builders call the project Leaning Tower Stack, and nobody is quite sure whether the lean is a joke or a mistake.
Each marble floor swings in over the pile, and a careless drop shaves off an edge. Galileo's trick is timing: he can send a piece back the other way once before it falls. Build high above the rooftops and the experiment on falling bodies can finally begin.










