Built on the shifting sands of a former estuary, the Leaning Tower of Pisa probably began tilting not long after medieval laborers laid its first foundation stones. In the 800 years since ...

Have you ever wondered if the Leaning Tower of Pisa is a catastrophe waiting to happen? In this one-minute video, Ask Smithsonian host Eric Schulze explains how architects and engineers spent the ...

A young Galileo is perched atop the Leaning Tower of Pisa. He is in the middle of his ... that all objects fall at the same rate. It's the kind of story that's easy to imagine, easy to remember ...