This is the first known sea turtle—and it laid hard eggs

Science | AAAS | 12/19/2018 | Staff
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Unlike all modern sea turtles, which lay eggs with soft, pliable shells, the earliest known sea turtle deposited eggs with hard, mineralized shells on the beach, a new study suggests.

The 120-million-year-old fossil (image above) was unearthed in central Colombia more than a decade ago. It belongs to Desmatochelys padillai, a species of sea turtle first described from other fossils in 2015. Since then, computerized tomography scans of the new specimen have revealed more than four dozen almost spherical eggs ranging between about 32 and 43 millimeters in diameter (four shown loose at left, above). And other tests, including a microscopic look at the mineral structure of the well-preserved eggs,...
(Excerpt) Read more at: Science | AAAS
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