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At first glance, it may seem that the life cycle of a glacier
couldn't be more straightforward: snow accumulates at the high
end of a glacier, and the ice that the snow turns into flows
downhill until it melts, evaporates, or falls into the sea.
Well, it turns out that a biography of your average glacier is
more eventful than that, as you'll discover when you follow
the journey of a single snowflake as it takes a ride through a
glacier, a process that can take as much as 30,000 years to
complete. To launch the
interactive, click on
the image at left.—Rick Groleau
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