My Greatest Adventure #79

A massive, snarling dinosaur clutches a red missile in its jaws while a terrified figure flees across a launch site surrounded by more rockets and smoky chaos — Bob Brown's cover for My Greatest Adventure #79 (May 1963) delivers an irresistible collision of the prehistoric and the space age. The cover text says it all: "When space-age missiles are menaced by a stone-age beast, it leads to… 'Countdown in Dinosaur Valley!'" DC's anthology series was reliably full of wild sci-fi premises, and this one, with searchlights sweeping the sky and a tyrannosaur treating modern rocketry like a chew toy, ranks among its most entertaining.