Hallow Earth

There's a conspiracy theory that says the Earth is hollow and that there might even be a whole other civilization of advanced beings living in it. The theory is rooted back in the 17th century when Edmond Halley—who has a comet named after him—proposed that the Earth must be hollow because of changing magnetism. In 2014, scientists found "a reservoir of water three times the volume of all the oceans" deep within the Earth. The water, however, isn't just sloshing around within the Earth, it's inside of ringwoodite, a rock, which is 435 miles deep beneath the Earth's surface. For some, this bolstered the theory that the Earth was hollow since the water was solidified in rock form. So, how do you access this secret world within a world? Via secret entrance at either the North or South Pole.

- By Daisy Hernandez (November 10, 2019)