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an ancient worm-like creature with spikes on its back
Photo

Hallucigenia's Spikes

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A rendering of an underwater marine scene from the Proterozoic Eon, featuring a creature that resembles a jellyfish and other organisms.
Photo

Ediacaran Community, Proterozoic Eon (2,500 - 542 Million Years Ago)

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An artistic rendering of an ocean landscape as it may have looked during the Archean Eon.
Photo

The Archean Eon (4,600 – 2,500 Million Years Ago)

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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 An Extinct Mammal May Have Been Replaced By Today's Sea Cows

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dugong feeds on seagrass in the Red Sea
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Dugong Feeding

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An artistic rendering of an ocean landscape as it may have looked during the Archean Eon.
Slideshow

The Ocean Throughout Geologic Time, An Image Gallery

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Mistaken Point New Foundland
Audio

Ediacaran Fossils: One Species at a Time

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Fossil Whale Digsite at Cerro Ballena, Chile
Article

The Whale Graveyard Whodunit

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A researcher holds an arm bone from a "toothed" mysticete whale from Vancouver Island.
Article

Dispatches from the Field: Treacherous stream crossings and a new fossil find

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An illustration of a recently discovered species of Monodontid, Bohaskaia monodontoides, and its beluga and narwhale relatives
Article

Smithsonian Scientists Describe a 'New' Fossil Whale

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