As the Alps walk continues, progress reports, background stories, audio and video elements will appear in this section.This content was published on August 21, 2001 - 09:14
Many 17th and 18th century men, from scientists to peasants, made contributions to the development of the ice age theory. But it wasn't until the early 19th century that the theory and the movement of glaciers was properly defined, thanks in no small part to experiments carried out in extreme and primitive conditions on the Unteraar glacier.
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