This is just in from the National Park Service: "The Lyell
Glacier, the largest glacier in Yosemite National Park, has
stagnated, or ceased its downhill movement, according to a
recent study conducted by scientists from the National Park
Service and the University of Colorado. The adjacent Maclure
Glacier is still moving at its historical rate, about one inch
per day. "Glaciers created much of the scenery of Yosemite,
including iconic features such as Half Dome. Glaciers are
defined as long-lasting ice masses that arise from the
accumulation of snow, and move downhill by flowing and sliding.
A glacier’s health is determined by the amount of winter
snowfall compared to summertime melting of snow and ice. The
movement of a glacier is primarily determined by the glacier’s
thickness and steepness. Because they are sensitive to
environmental conditions, glaciers are important indicators of
climate change. "Building on historical research conducted by
John Muir and other notable individuals in Yosemite’s history, t