How were the oceans originally formed on Earth? – IILSS-International institute for Law of the Sea Studies

Natural history of oceans

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Over vast periods of time, our primitive ocean formed. Water remained a gas until the Earth cooled below 212 degrees Fahrenheit . At this time, about 3.8 billion years ago, the water condensed into rain which filled the basins that we now know as our world ocean. 1521: Ferdinand Magellan tried to measure the depth of the Pacific Ocean with a weighted line, but did not find the bottom. 1818: The British researcher Sir John Ross was the first to find that the deep sea is inhabited by life when catching jellyfish and worms in about 2,000 m (6,562 ft) depth with a special device.