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By studying ancient shark scales collected 5 kilometres under the Pacific waves, experts found that the animals almost went extinct 19 million years ago.

United statesRed seaDjibouti generalDana pointMindy schauer gettyElizabeth sibertElphinstone reefPacific oceanLeah rubinJackson pollockAlexander vasenin wikimedia commonsYale universityCollege of the atlanticWikimedia commonsOcean science conferenceChase stone