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July 5 2013

How Do You ... Deduce Ancient Climates from Microscopic Fossil Shells?

Clay-rich marine sediments in southeastern Tanzania contain some of the world's best-preserved fossils of ocean-dwelling microorganisms, including the foraminifera that I use to study ancient climate and ocean systems.

Foraminifera are tiny, single-celled sea creatures with solid shells, and they have lived in the oceans since the Cambrian Period more than 500 million years ago.

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