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Dr. Raymond Bernard was a pseudonym, and his bizarre book was a 60s classic of weird UFO literature. Said the original back cover copy for the book: Revealed! The Underground World of Supermen Discovered Under the North Pole! Can you explain the following? Why does one find tropical seeds, plants and trees floating in the fresh water of icebergs? Why do millions of tropical birds and animals go farther north in the wintertime? If it is not hollow and warm inside the Earth at the Poles, then why does colored pollen color the ...

The Hollow Earth 2009, Adventures Unlimited Press, Kempton, IL

ISBN-13: 9781931882996

Trade paperback

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Hollow Earth 1969, Carol Publishing Corporation

ISBN-13: 9780821600900

Hardcover

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