The Leaning Tower of Pisa isn't the first tower to lean. It's not even the lean-iest building out there. What sets it apart is its sheer size — and the fact that, despite its severe angle, it's been standing up since the 14th century. Now, scientists have determined how it's managed to stay stabilized. Turns out it's the same reason that it started leaning in the first place.
Started from the Bottom
When Soft Means Strong
Why Does the Leaning Tower Lean?
Key Facts In This Video
The Leaning Tower of Pisa used to lean at a 5-degree angle, but restorative efforts have decreased its tilt to around 4 degrees. 00:05
This is an error—the Leaning Tower of Pisa weighs around 14,500 tons. 00:20
The Leaning Tower of Pisa actually leans and curves back upward, like a banana. 00:46
To stabilize the Leaning Tower of Pisa, workers removed about 220 pounds (100 kg) of soil from beneath its raised end every day for a year. 02:41
Engineers claim the Leaning Tower of Pisa can survive another three centuries. 02:58
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