We toured the Perito Moreno Glacier today. It was named for the explorer Francisco Moreno who found and explored Lake Argentina. He never saw the lake but as he was referred to as Perito (Expert) later in life, when the glacier was found near Lake Argentina, it was given his name. The glacier extends over 200 meters to the floor of the lake and 60 meters above the surface. It sometimes extends to create a dam between Lake Argentina and the North Branch or the Rich Branch of the river. When this happens, eventually the power of the water destroys a part of the glacier creating icebergs and ice flows. The last time this happened was 2004. It currently has created a dam and they are waiting to see when it will erode. In 2004, it took 4 days and it was televised world wide.