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Mysterious hole on the ocean floor off California’s coast

Alien & UFO Ancient History Chưa phân loại UFOs Sighting

On the sea bottom off the coast of central California lies a vast field of mysterious pockmarks.

 

The field spans about 1,300 square kilometers and there are approximately 5,200 of these strange pits, which on average measure about 175 meters and 5 m deep.
No one knows how these mystery holes appeared, but they likely made their first appearance 400,000 years ago, according to research.
Coordinates: 33°39’17.76″N 118° 7’5.82″W
https://www.livescience.com/mystery-california-seabed-pockmarks.html
Vast field of mysterious, perfectly circular holes dot the seafloor off California’s coast.
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