Mystery in Space #22

Two spacesuited explorers and a wide-eyed woman stare in astonishment at a giant translucent cube floating against a star-filled sky — its faces mapped with the continents of Earth, suggesting the planet itself has somehow become a perfect square. Murphy Anderson's cover for this 1954 DC anthology issue poses the irresistible question right there in the tagline: "Is the world really round? Discover the amazing secret of… The Square Earth!" With Otto Binder writing and Sy Barry on art, Mystery in Space #22 delivers exactly the kind of mind-bending science-fiction premise that made this series such a delight of the era.