Rick Janowicz, Michael Parfit, and Jay Dickman searched the Llewellyn Glacier in British Columbia for the source of the Yukon River. They were the first to identify the river's starting point, an unnamed stream that burst from underneath the ice.
(Photographed on assignment for, but not published in, "The Untamed Yukon River," July 1998, National Geographic magazine)
Photograph by Jay Dickman
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