First English translation of the book that introduced the realm of Hollow Earth. Explores the underground world of Agarttha, sometimes known as Shambhala, a rea

Beliefs in mysterious underworlds are as old as humanity. But the idea that the earth has a hollow interior was first proposed as a scientific theory in 1691 by

1964 Dr. Bernard says this is the true home of the flying saucers. the epoch-making significance of Adm. Byrd's flight for 1,700 miles into the North Polar open