Hollow Planets: A Feasibility Study of Possible Hollow Worlds

The great English astronomer, Sir Edmund Halley first proposed the Earth might be hollow. Later the great mathematician, Leonhard Euler speculated about this, as did the scientist, Sir John Leslie. Jules Verne's classic tale 'Journey to the Center of the Earth' was based on Leslie's ideas. Some religions maintain, to this day, that a vast Underworld exists inside the Earth. More

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