The tower of Pisa has been leaning for over 800 years. In 1990, engineers projected that the tower would topple if it reached an angle of 5.44 degrees— and the structure was still leaning at 5.5. What gives the tower its infamous tilt, and why hasn’t it collapsed yet?

Via – TED-Ed

>>SHOW ME ANOTHER ONE<<

Follow ScienceSwitch on Twitter and Instagram

Advertisement