What Is Sea Level?
We say that Mount McKinley in Alaska is 20,320 feet above sea level, or that Death Valley, in California, is 282 feet below sea level. And we say that the surface of...
Read MoreWe say that Mount McKinley in Alaska is 20,320 feet above sea level, or that Death Valley, in California, is 282 feet below sea level. And we say that the surface of...
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