Is there an alien world 700 miles below us, in the ocean under the ocean?

The Mariana Trench is the deepest part of the ocean, it’s about 6.8 miles deep, it’s very cold, completely cut off from sunlight and has a pressure of about 1,000 times that of sea level - but life is abundant there. So far, everyplace we’ve found water, we’ve also found life. But what about the other ocean?

Deep, very deep, beneath the Earth’s surface is another ocean. According to recent research it’s three times the size of all of the oceans on the surface. There is a good chance that there is nothing down there but rock and water but, again, everywhere we’ve found water, we’ve found life.

There is a good chance that, through earthquakes and volcanic activity that water from the surface has mixed with the water 700 miles beneath the surface and if life got a chance to start down there, it’s had a long time to evolve, almost as long as life on the surface.

Any life existing down there, under inconceivable amounts of pressure, would have been protected from things like climate change and asteroid impacts, even from atmospheric poisoning and conceivably would have survived all of Earth's mass extinctions.

Its environment would be warm and incredibly dark. There could even be land - dark caverns of incredible size, which creates the possibility of amphibians or even "land" dwelling animals and the food chain would begin with chemosynthetic animals.

"In biochemistry, chemosynthesis is the biological conversion of one or more carbon molecules (usually carbon dioxide or methane) and nutrients into organic matter using the oxidation of inorganic molecules (e.g. hydrogen gas, hydrogen sulfide) or methane as a source of energy, rather than sunlight, as in photosynthesis."

However, just as it does in the deep sea, the food chain could go up many levels from chemosynthetic bacteria.

At any rate, if there's a possibility of life on Jupiter's moon Europa or under the Martian ice caps, then it's a least possible that there is life in the vast oceans under the oceans.

When I want to stimulate my imagination, creep myself out or both at the same time, I like to think about what could be living down there, hundreds miles beneath our feet.

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