Space Adventures #12

This issue contains at least two stories. The first follows a spacecraft crew exploring a hostile alien planet where they encounter a green slime substance emerging from volcanoes and must locate and seal the source of this "unknown element" while being attacked by alien creatures. The second story involves a young writer named Wilburt Byrne who claims to have witnessed a flying saucer landing in Henderson's Valley and written a science-fiction novel about it; when flying saucers from Saturn actually land at an Army field, military officials contact Byrne, suggesting his story may have been based on telepathic messages. A third story features Val Nork, an alien invader who has infiltrated humanity and plans to conquer Earth by destroying the human race, but discovers he is vulnerable to cosmic rays and must hide in an underground laboratory until he can complete his conquest.