Professor John Burland has spent the last two decades striving to save - and understand - the Leaning Tower of Pisa. After defying gravity, Italian bureaucracy and accusations of corruption, it seems he’s finally cracked the case. [snip] Via his data analysis, Burland unlocked the 800-year mystery as to why the tower leans south not north: namely, a fluctuating water-table on the upper layer of silt. By a quirk of local geography, Pisa’s water-table rose higher on the tower’s north side, often reaching within one foot in rainy season, and this gave the tower an annual ratchet southward. Armed with...
