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Oregon State University

The last time the oceans got this warm, sea levels were 20 to 30 feet higher than they are today

The last time the oceans got this warm, sea levels were 20 to 30 feet higher than they are today

Ocean temperatures today are about the same as they were more than 100,000 years ago — at a time when sea levels were 20 to 30 feet higher.

The findings, published in the journal Science, highlight the key role that human activity has played in global warming and underscore concerns about the future impact of rising sea levels.

Over millions and billions of years, the Earth has gone through periods of cooling (when water freezes out of the oceans, causing glaciers to grow and sea levels to fall) and warming (when the ice melts and sea levels rise). Scientists often look for clues hidden in...

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