Whenever you enter a national park or wildlife preserve, think about John Muir (April 21, 1838 to December 24, 1914), and thank him.
John Muir In The New World, a wonderful biographical documentary about the great American environmentalist, will show and tell you exactly why.
Watch it now on PBS. Meanwhile, please read my review.
(PHOTO: John Muir in 1902. Courtesy PBS American Masters).
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