Dynamic natural wonder
April 11th 2007 Just to give a quick background on what this glacier thing really is (since I didnĀ“t understand all of it before I got there) From Wikipedia: http://en.wikipedia.org/wiki/Perito_Moreno_Glacier "The Perito Moreno Glacier is one of only three Patagonian glaciers that are not retreating. Periodically the glacier advances over the L-shaped "Lago Argentino" ("Argentine Lake") forming a natural dam
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