prehistoric civilization

At the bottom of the Baltic Sea, there is a mysterious disk hidden, with a diameter of about 60 meters and a height of about 4 meters.

Determining the existence of a civilization on Earth that predates humans is a thorny question and attracts the interest of many scientists and archaeologists.

Some scientists believe that before humans came into existence, there may have been other advanced creatures on Earth and that we are not the only advanced life on this planet.

A map dating back to the 16th century accurately redraws the northern Antarctic coast, but when it has never been covered by ice. How can people know this continent at a time when