fotojournalismus:

The Perito Moreno glacier is seen after the rupture of a massive ice wall near the city of El Calafate in the Patagonian province of Santa Cruz, southern Argentina, March 4, 2012. The glacier, a massive tongue of ice in the Santa Cruz province that covers 250 square kilometres (97 square miles), advances yearly into a lake, known as Lago Argentino.&nbsp;The breakdown process, which began on Feb. 29, was caused by the pressure of water above the ice dam, which began to crack to form an arch-shaped hole that ended up weakening and finally collapsing. The natural phenomenon happens infrequently - from once a year to less then once a decade.
[Credit :&nbsp;Andres Arce / Reuters]
