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Uploaded on Nov 12, 2009
Paleontologist Kirk Johnson visits the Gingko Petrified Forest near Vantage, WA and discusses how petrified wood is formed. Johnson has teamed up with Seattle's Burke Museum of Natural History and Culture to co-curate the exhibition "Cruisin' the Fossil Freeway," on view from Dec. 19, 2009 to May 31, 2010. www.burkemuseum.org