OSLO (Reuters) - Giant glaciers formed about 90 million years ago when alligators thrived in the Arctic, overturning the belief that all ice melts in a "super greenhouse" climate, researchers said on Thursday.
The study, based on organic molecules in ocean sediments and chemicals in ancient fossil shells, indicated there were ice sheets in Antarctica during parts of the Turonian period, one of the warmest times in history when dinosaurs roamed the planet.
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