WHERE DO FLYING SAUCERS COME FROM? There are two maJor theories regarding the origin of the flying saucers: 1) the theory that they come from other planets, and 2) the theory that they come from inside the earth. For some years, the former theory was the most popular one, and many books came out about "spaceships." Recently, however, foremost authorities on flying saucers, such as Ray Palmer, editor of "Flying Saucers" magazine, are inclined to the view that they come from the hollow interior of the earth, coming out through polar openings. In the following pages, we shall present scientific evidence in favor of this latter conception, rather than the belief that flying saucers come from other planets. There is not a particle of evidence in support of the interplanetary or extraterrestrial thesis. (ETH) We shall attempt to show that the ETH is false, and that the true origin of the saucers is an advanced civilization existing inside our planet. For, rather than being solid as was formerly supposed, the earth has a hollow interior with openings at the poles through which saucers fly back and forth between the external and the internal atmosphere of the earth.