According to BBC, an expert team from Arizona State University has found huge mountains around 2900 kilometers inside the earth between the boundaries of the core and mantle. These mountains were found by using seismology centers in Antarctica.

"The mountain-like structures they revealed are utterly mysterious," said the BBC report. Scientists explained that the reason these mountain ranges managed to escape the experts all this time is that these ranges are in ultra-low velocity zones or ULVZs. They also believe that these mountain ranges are over 24 miles (38 kilometers) in height as compared to Mount Everest which is 5.5 miles (8.8 kilometers) from the surface.

"Analysing 1000's of seismic recordings from Antarctica, our high-definition imaging method found thin anomalous zones of material at the Core-Mantle boundary (CMB) everywhere we probed," Edward Garnero, geophysicist at the Arizona State University said in a statement. He also added, "The material's thickness varies from a few kilometers to 10's kilometers. This suggests we are seeing mountains on the core, in some places up to 5 times taller than Mount Everest."

The possible reason for the formation of these mountain peaks is believed to be when the oceanic crusts were formed in the earth's interior. It could also have begun with tectonic plates slipping down into the earth's mantle and sinking to the core-mantle boundary. This would mean that these structures are made of ancient oceanic crust, which is a mixture of sediments from the ocean floor and basalt rocks.