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Documentary: How Yosemite was created

Yosemite is one of the world’s most iconic climbing destination. John Muir theorized that it was formed by glaciers which carved a valley in the 100-million-year-old granite, but his idea was criticized at the time because glacial valleys are u-shaped and Yosemite is flat. Climbers constantly deal with rock fall, learn why it happens along in this documentary all climbers should watch.