In the late 1960s, geologist Frank R. Wielgus, Jr. told the BBC that the Earth was hollow, a theory that was never confirmed.
“I would say that it is not the last time we have heard of it,” he said at the time.
Wieslgus made the claim in a book called The Hollow Earth, which was published in 1983.
It’s an idea that has continued to spread, even as other scientists have debunked the idea.
The theory is rooted in a theory by geophysicist Richard H. Muller that the core of the Earth is composed of an expanding mantle.
Muller, who died in 2015, used this theory to make a bold claim: that the mantle of our planet is expanding to the point where it is no longer able to sustain the heat energy needed to sustain life on Earth.
He believed that the world would end if it stopped expanding, because the Earth’s heat would be too intense.
If this were the case, then Earth’s core would expand too fast, and the core would collapse under its own weight, according to Wieslsge.
Wierslguses theory was based on a theory called Muller-Schiener theory, which says that the expanding Earth was created in the last two billion years.
It was also based on Muller-Muller’s “grand unification” theory, in which two forces act on the Earth.
“The Grand Unified Theory is a very popular theory,” Michael G. Miller, a geophysicists and earth sciences professor at Ohio State University, told Business Insider.
“There are hundreds of variations on it, and all of them make some sort of claim.
It is very popular in many places, and I think it has spread very broadly.
I would say, it’s probably not the only one.”
The theory of the hollow Earth dates back to the late 1990s, when a professor at Indiana University called it “a good guess,” but it never gained traction in the academic community.
WierlgUS claims to have solved Muller-Schiener theory by using his own model of how the Earth formed, which has the mantle as a fluid and the Earth as a solid.
In his new book, Wiesles geophysician, he said the Earth has a mass of about 1.8 times that of the Moon.
It has a thickness of about 4.6 miles, and a density of about 12 grams per cubic centimeter, which is similar to that of water.
The volume of the mantle is about 2.8 billion cubic kilometers.
Miller said the density of the earth would be about 0.3 kilograms per cubic meter, and that the density could be raised to 0.6 kilograms per centimeter.
The idea that the surface of the world is hollow has also been used to support claims of the “flat Earth,” a theory of gravity that says that there is no gravity around the Earth because of the curvature of space.
In the 1980s, scientists from the University of Colorado Boulder created a model of the globe to support this theory.
The team also made the assumption that the sun’s light and the atmosphere of the atmosphere are traveling at the same speed.
The flat Earth theory is now considered one of the main reasons for the global warming debate, which began in the 1990s.
“It is certainly a hypothesis,” Miller said.
“But it is one that I think has a lot of support in the scientific community.”
He said that scientists have now been able to see evidence that the flat Earth actually exists, and has been able see evidence of other theories that have also been debunked.
Miller added that the theory is also “really exciting,” because it has now been validated in many parts of the planet.
The “flat earth” theory has also spawned its own social media buzz.
A group called the Flat Earthers, which started in March, has already created a hashtag to support its claims.
Miller told Business News Daily that he hopes his theory has been accepted and will be used in future scientific publications.
“If the flat earth theory is proven correct, it would be a huge scientific milestone,” Miller told the publication.
“And I think this could actually serve as an important tool for our generation, as it allows us to see what other ideas are out there that are similar to ours, and it’s going to allow us to think about how to further refine our ideas in the future.”