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February 25, 2021
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Sea ice kept oxygen from reaching deep ocean during last ice age, study finds
Sea ice covered the world's oceans during the last ice age, which prevented oxygen from reaching the deep sea.
Credit: USGS
Images credited to the National Science Foundation, a federal agency, are in the public domain. The images were created by employees of the United States Government as part of their official duties or prepared by contractors as "works for hire" for NSF. You may freely use NSF-credited images and, at your discretion, credit NSF with a "Courtesy: National Science Foundation" notation.
Additional information about general usage can be found in Conditions.
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