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New study: Ancient Arctic sharks tolerated brackish water 50 million years ago

June 30, 2014

collecting ancient sharks teeth on Banks Island Sharks were a tolerant bunch some 50 million years ago, cruising an Arctic Ocean that contained about the same percentage of fresh water as Louisiana's Lake Ponchatrain does today, says a new study involving the University of Colorado Boulder and the University of Chicago. Full Story

University of Colorado at Boulder

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