Polar bear cubs forced to swim long distances with their moms as their icy Arctic habitat melts appear to have a higher mortality rate than cubs that didn't swim as far, a new study reports.
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Mon, 07/18/2011 - 3:14pm
Polar bear cubs forced to swim long distances with their moms as their icy Arctic habitat melts appear to have a higher mortality rate than cubs that didn't swim as far, a new study reports.