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Yellowstone National Park Juvenile Bighorn Sheep casually amble along a precipice near Tower Falls.
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Yellowstone National Park
Yellowstone National Park Historian

Yellowstone’s historian, Lee Whittlesey, is available to researchers during his office hours, Monday-Friday, 8am-5pm. Please contact Mr. Whittlesey in advance at (307) 344-2261 or via email at e-mail us

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Last Updated: April 17, 2007 at 12:52 MST