Scientists have discovered a vast underground ocean located about 700 kilometers below the Earth's surface. This new finding reveals an ocean three times larger than all the Earth's surface oceans ...

Underground ocean in the transition zone Researchers have long speculated about the existence of an ocean located between the upper and lower mantle, in what is known as the transition zone, at a ...

The most likely explanation, they recently reported in the journal Geophysical Research Letters, is a massive underground ocean that has more water than all of the great lakes in North America ...