Last updated on April 21, 2014 at 1:20 EDT
Frozen Lake Superior
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Frozen Lake Superior

February 20, 2013
These Moderate Resolution Imaging Spectroradiometer (MODIS) images show the ice in Lake Superior on selected dates in February and March 2003. It is very rare for Lake Superior to freeze over completely due to its large size and great depth, both of which inhibit freezing. Credit: Jacques Descloitres, MODIS Rapid Response Team, NASA/GSFC