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This undated photo made available by Julius Nielsen on August 11, 2016 shows a Greenland shark slowly swimming away from a boat, returning to the deep and cold waters of the Uummannaq Fjord in northwestern Greenland during tag -and- release program in Norway and Greenland. In a report released Thursday, Aug. 11, 2016, scientists calculate this species of shark is Earth’s oldest living animal with a backbone. They estimate that one of those they examined was born roughly 400 years ago, about the time of the Pilgrims in the U.S., and kept on swimming until it died only a couple years ago. (Photo by Julius Nielsen via AP Photo)
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