US President Theodore Roosevelt (1858-1919, left) and Scottish-American naturalist and geologist John Muir (1838-1914, right) on Glacier Point, Yosemi
US President Theodore Roosevelt (1858-1919, left) and Scottish-American naturalist and geologist John Muir (1838-1914, right) on Glacier Point, Yosemite National Park, California, USA, in 1903. Muir spent years studying the geology and natural history of the Yosemite Valley. He proposed a theory that glaciers had sculpted the valley, and persuaded President Roosevelt to support the protection of Yosemite in a National Park.
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Photo credit: © LIBRARY OF CONGRESS/SCIENCE PHOTO LIBRARY / Alamy / Afripics
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