Pieces of ice fall from the front of Argentina's Perito Moreno glacier near the city of El Calafate, in the Patagonian province of Santa Cruz, in this picture taken on December 14, 2009. Scientists warn that glaciers in the Andes are melting because of the effects of climate change. According to studies, these accumulations of ice are thawing at a pace so fast that they could disappear in 25 years. Picture taken December 14, 2009.
REUTERS/Marcos Brindicci (ARGENTINA - Tags: ENVIRONMENT TRAVEL)