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

In this fresh and innovative middle grade fantasy, imagination matters most in a world where art can keep monsters trapped—or set them free. Lots of twins hav

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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