Thinking of Italy's Pisa instantly conjures the image of its leaning tower – the famous, centuries-old architectural marvel ...

A young Galileo is perched atop the Leaning Tower of Pisa. He is in the middle of his ... These are carried out entirely in the mind using reasoning and logic to help explain complex ideas.

Oh, the Leaning Tower of Pisa — so touristy and yet so fun. Each day, hordes of visitors come to the small northwestern Tuscan town of Pisa to take pictures "propping up" its tower. Some do it ...

Did you know the Leaning Tower of Pisa started in August 1173? It has made it through at least four big earthquakes. The tower was meant to be a grand bell tower. But it began to lean just five ...