The Ocean Through Time

Life began in the ocean around 3.5 billion years ago and as evolution progressed, many species went extinct -- and some left behind fossils -- as others appeared. And even now, the ocean hasn't stopped changing as evolution continues and humans leave their mark.

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At the ends of the Earth, life thrives despite extreme conditions. In the Arctic and Southern Oceans, organisms have evolved adaptations to cope with year-round cold and six months of darkness. But the tough...
For the last 150 years, paleontologists have debated the origins of the great...
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Microscopic, single-celled organisms called foraminifera have a fossil record...
CREDIT: Smithsonian Arctic Studies Center Basque Whalers Background Having...

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