Tower of Pisa
1986/04/01 Elhuyar Zientzia Iturria: Elhuyar aldizkaria
Antton Valverde sings ironically "The tower of Pisa, waiting for it to fall like her...". If at least we have to pay attention to Italian professor Brunello Palla, the "thieves" of Antton Valverde will not have to long until this surprising tower is abandoned. According to studies by Palla, last summer the inclination of the tower of Pisa has increased.
The cause of the inclination increase is related to obtaining drinking water from Pisa. The drinking water of Pisa is obtained underground. It is the water trapped in the water table. When emptying the water table, earth movements occur despite regaining balance. However, these movements aggravate the state of the tower of Pisa.