In this May 18, 2009 file photo, a tourist looks back through a cave on Perito Moreno Glacier in Los Glaciares National Park in Argentina's Patagonia region. (AP Photo/Natacha Pisarenko, File)From Yahoo News/AP:
BUENOS AIRES, Argentina – Argentina's Perito Moreno glacier is one of only a few ice fields worldwide that have withstood rising global temperatures.
Nourished by Andean snowmelt, the glacier constantly grows even as it spawns icebergs the size of apartment buildings into a frigid lake, maintaining a nearly perfect equilibrium since measurements began more than a century ago.
"We're not sure why this happens," said Andres Rivera, a glacialist with the Center for Scientific Studies in Valdivia, Chile. "But not all glaciers respond equally to climate change."
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