Curious when the ocean freezes? Learn how salt affects freezing and why sea ice forms in only the coldest climates.
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Scientists record coldest ocean temperature ever in Earth's history—and wonder how life survived
About 700 million years ago, Earth was entombed in a veneer of ice hundreds of feet thick—a frozen state scientists refer to ...
During the last ice age, the Atlantic Ocean's powerful current system remained active and continued to transport warm, salty ...
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