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An artistic rendering of an ocean landscape as it may have looked during the Archean Eon.
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The Archean Eon (4,600 – 2,500 Million Years Ago)

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Two nurse sharks hover over a baited cage
Lesson Plan

Fossil Forams and the Scientific Process

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Color illustration of an ancient bivalve.
Slideshow

Rudist Reefs

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A shark tooth embedded in a bone
Article

What the Megalodon Left Behind

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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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Forams are tiny single-celled organisms.
Slideshow

Foraminifera

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Colorful illustration of extinct Archaeocyatha that lived on the seafloor.
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Archaeocyatha

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400 to 1,000 year old bones from an endangered seabird, the Hawaiian petrel. Bones such as these provide a window into the lives of seabirds before and after human arrival in the open ocean environments of the North Pacific.
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Petrel Bones Help Us Understand History

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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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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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A hippopotamus-like creature swims underwater
Article

Flippers or Feet? An Extinct Mammal May Have Been Replaced By Today's Sea Cows

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Smithsonian scientists race the tide the excavate an ancient whale fossil entombed in rock
Article

Fossil Whale Found, Excavated, Jacketed, and Returned to STRI!

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