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Earth’s oceans cover about 361 million square kilometers. There’s about ten times more water in the oceans than the volume of land that sits above sea level. But is all the water on Earth accounted for?
In Australia, a well was drilled 3,000 meters deep, revealing a vast underground water reservoir that stretches beneath much of the sun-baked, wind-swept continent.
Some scientists have proposed that similar underground seas may exist beneath other continents. Recent discoveries lend support to that idea.
Chinese geologists recently uncovered a massive underground sea beneath three provinces—Henan, Anhui, and Jiangxi.
The area of this hidden reservoir is approximately 200,000 square kilometers—more than five times the size of the Sea of Azov.
