Beneath nearly two million years of Arctic mud, a microscopic drama has been playing out unnoticed. Today’s sea-ice-covered central Arctic Ocean hosts just one species of calcifying planktonic foraminifera, a hardy, non-spinose shell-builder called Neogloboquadrina pachyderma. Yet scattered through Quaternary sediment cores from the Lomonosov, Alpha, Mendeleev and Northwind ridges, scientists have repeatedly found horizons crowded with spinose, subpolar species that should not…
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Source bioengineer.org
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