Summer sun sends Pisa round the bend

Geake, E.
April 1992
New Scientist;4/18/92, Vol. 134 Issue 1817, p20
Reveals that Pisa's famous tower is being adversely affected by the sun. Effect of sun on stonework; Commission is trying to preserve the tower and reduce its tilt by about ten percent; Why the tower tilted early; Each attempt to stop it from leaning has made the situation worse.


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