Primitive Warriors Battle a Dinosaur — Fantastic Adventures October 1945

Prehistoric survival and lost-world science — the concept of humans coexisting with living dinosaurs in an undiscovered primeval land — explodes across this cover. Two loincloth-clad warriors, weapons raised and bloodied, ride and grapple atop a massive rearing dinosaur in a swampy jungle setting. The beast's scaled hide and reptilian neck are rendered in cool grey-green tones against a vivid yellow sky, while red streaks of blood add visceral drama to this high-energy lost-world confrontation.