The Ontario Science Centre is one of Canada’s most visited attractions. Discover hundreds of interactive exhibits, daily demos and more!
1291 days ago
The 1980 Mt. St. Helens eruption sent ash into the air to a height equivalent to 30 Sears Towers. #NatureUnleashed: http://tinyurl.com/5uc5tvw
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July 22, 1980: The eruption of Mount St. Helens, showing an elutriate cloud from pyroclastic flow rising through cloud layer.
Copyright United States Geologic Survey; Photo by Jim Vallance
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