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On average, Arctic sea ice has decreased by four percent per decade since the late 1970s.
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Sea Level Rise

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Forams are tiny single-celled organisms.
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Foraminifera

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World map during last ice age
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Ice Age Map of the World

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Globotruncana falsostuarti -- a foram that lived about 75 million years ago, during the Cretaceous Period.
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Globotruncana falsostuarti

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Lenticulina secans-- this “benthic” foram lives on the seafloor. This specimen was collected from southeastern Tanzania.
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Lenticulina secans

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Hantkenina mexicana -- a foram with elongated shell chambers that lived between 45-49 million years ago, during the Eocene Epoch.
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Hantkenina mexicana

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