Mystery in Space #37

From DC's beloved science-fiction anthology comes this 1957 gem featuring "Secret of the Masked Martians!" — and the cover by Gil Kane and Joe Giella sets up the puzzle perfectly. A wide-eyed human reacts in alarm as three green-skinned, caped Martians advance toward him, each wearing an identical human face as a mask, while a spacecraft and onlookers loom in the background — all framed by the tantalizing speech bubble: "They're Martians — but they're all wearing identical Earthman's masks! WHY?" With Otto Binder writing and Sid Greene on interior art, this is exactly the kind of clever, irresistible sci-fi hook that made Mystery in Space one of DC's most imaginative titles of the era.