Will the Leaning Tower of Pisa ever fall?
The tower of Pisa has been leaning so long -- nearly 840 years -- that it's natural to assume it will defy gravity forever. But the famous structure has been in danger of collapsing almost since its first brick was laid.
Engineers expect the famous structure will remain stable for at least another 200 years. By then, more intervention may be required, but the technology available to make improvements could be far more advanced and preserve the tower for another 800 years.
Full article at HowStuffWorks.com.
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