Editor’s Note: This blog post was updated to include more context, including from experts who refute the primary claims made by the UFO analyst.

UFO analyst Billy Carson joined podcaster Shawn Ryan for an interview in mid-January, warning against scientific research in Antarctica.

Carson told Ryan of “The Shawn Ryan Show” that there are secret pyramids beneath the ice of Antarctica, specifically near the Ellsworth Mountain range, and any disturbances to the area could lead to the awakening of an “ancient evil.”

Mauri Pelto, an environmental science professor at Nichols College, believes the pyramid shape comes from freeze-thaw erosion, which occurs when water, like from melting snow, fills crevices within a mountain in daytime. The snow or water will freeze, then turn into ice when temperatures fall, according to Pelto, who spoke to Live Science, a science news publication. The transition from snow to ice expands the mountains’ cracks.

“This is just a mountain that looks like a pyramid,” University of California, Irvine, professor Eric Rignot told Live Science. “Pyramid shapes are not impossible — many peaks partially look like pyramids, but they only have one to two faces like that, rarely four.”

Rignot noted that other mountains, like the Matterhorn in the Alps, also appear to be shaped like a pyramid.

There’s also a pyramid in Bosnia that researchers won’t let anyone near, according to Carson and amateur archaeologist Sam Osmanagich, whose claims were rebutted in a Smithsonian Magazine article, citing experts.

“Look at Bosnia, in Europe. It’s massive. There are tunnels underneath that are connecting the pyramids but in one tunnel they found this gigantic crystal,” Carson claimed. “It’s called a K2 megalith and on it is written in runes, ‘We must stand in defense until we can open the gate.'”

Several experts refuted that allegation. (RELATED: A 27,000-Year-Old Pyramid Is Causing Much Debate For Big Archaeology)

“When I first read about the pyramids I thought it was a very funny joke,” Amar Karapus, a curator at the National Museum of Bosnia and Herzegovina, told Smithsonian Magazine. “I just couldn’t believe that anyone in the world could believe this.”

“The landform [Osmanagich] is calling a pyramid is actually quite common,” Paul Heinrich, an archaeological geologist at Louisiana State University, also told Smithsonian Magazine. “They’re called ‘flatirons’ in the United States and you see a lot of them out West.”