yet the result is a sudden increase in the tower's tilt of 31 arc seconds. (Five arc seconds is equivalent to 1.5 millimeters, or a little over half an inch, of movement at the top of the tower.) ...
Over time, the Leaning Tower became a symbol ... This mix has made the tower tilt by about 5.5 degrees. Soft soil usually causes problems for buildings. But, the tower’s geology has helped ...
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