Is it possible that there is an advanced civilization living beneath the surface of our planet? <br /> <br />Many people believe that the Hollow Earth theory is more than just a myth, and some have even tried to prove it scientifically. Even today, in the 21st century, it’s difficult to say with certainty that it does or does not exist. <br /> <br />For many years it was believed that the earth was hollow, but even though many have come up with theories, until 1968 there was no proof. <br /> <br />That year, pictures taken by a satellite orbiting Earth clearly showed a gaping hole located at the North Pole; enough evidence to support the hollow Earth theory according to many. https://www.youtube.com/watch?v=uwfDdOn336A
