A mysterious hole at the bottom of the ocean off the coast of California

Deep in the ocean, off the coast of central California, lies a vast field of mysterious markings.

The field covers about 1,300 square kilometers and there are about 5,200 of these strange pits, which average about 175 meters and 5 m deep.

Nobody knows how these mysterious holes appeared, but they probably first appeared 400,000 years ago, according to research.

Coordinates: 33°39’17.76″N 118°7’5.82″W

WEBSITE: https://www.livescience.com/mystery-california-seabed-pockmarks.html

A vast field of mysterious, perfectly circular holes dot the seabed off the California coast.

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