Commenting on Giannini's statements about the impossibility of going straight north, over the North Pole and reaching the other side of the world, which would be the case if the Earth was convex, rather than concave, at the Pole, Palmer writes in his magazine, "Flying Saucers:"
"Many of the readers stated that commercial flights continually cross the Pole and fly to the opposite side of the Earth. This is not true, and though the Airline officials themselves, when asked, might say that they do, it is not literally true. They do make navigational maneuvers which automatically eliminate a flight beyond the Pole in a straight line, in every sense. Ask the pilots of these polar flights. And when they come to the exact point, name one trans-polar flight on which you can buy a ticket which actually crosses the North Pole.
"Examining the route of flights across the North Polar area we always find that they go around the Pole or to the side of it and never directly across it. This is strange. Surely a flight advertised as passing directly over the North Pole would attract many passengers who would like to have that experience. Yet, strangely, no airline offers such a flight. Their air routes always pass on one side of the Pole. Why? Is it not possible that if they went straight across the Pole, instead of landing on the opposite side of the Earth, the plane would go to that land beyond the Pole, `the center of the Great Unknown', as Admiral Byrd called it?"
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The Hollow Earth Dr. R. W. Bernard, B.A., M.A., Ph.D.
Before Columbus discovered America, belief in the existence of a New World across the Atlantic, in the form of a western continent, was considered as the dream of a madman.
Equally strange, in our own time, is the belief in the existence of a New World, a Subterranean World, in the hollow interior of the Earth, and which is as unknown to present humanity as the American continent was to Europeans prior to its discovery by Columbus. Yet there is no reason why it, too, may not be discovered and its existence established as a fact.