Blue Glacier on Mount Olympus used to gauge global warming

OLYMPIC NATIONAL PARK -- Blue Glacier is a study in trickle-down ecology -- with a warning that soon there may be nothing left to trickle.

The ancient ice mass on the north side of Mount Olympus is flowing faster as melted water than it is growing in ice.

It's a classic example of global warming, say glacier experts from the U.S. Geological Survey and the University of Washington.