Former Vice President Al Gore shocked Americans in "An Inconvenient Truth" when he said polar bears were drowning because global warming was melting Arctic sea ice, but now a new study shows that polar bears did just fine even when there was no ice covering the Arctic. Scientists with the U.S. Geological Survey (USGS) and the University of Alaska, Fairbanks released a study claiming the "stratigraphic record of the last 1.5 (million years) indicates that no marine species' extinction events occurred despite major climate oscillations," including periods where the Arctic was completely ice-free in summertime. "Some species thought to be...