Mystery in Space #50

In "The Runaway Space-Train!" from *Mystery in Space* #50 (1959), a group of humans aboard a train mysteriously transported across the cosmos find themselves on the alien world of Almoran—just as a contingent of Almoran aliens, disguised as Earthlings, arrives on our planet. When both groups are suddenly rendered unconscious by a mysterious ray from an enemy ship, the humans play dead, then use their wits to outmaneuver the invaders. The Almorans, impressed by their courage, grant them the rare gift of preserved memory—though they’re sealed in silence, forbidden to speak of what they’ve seen.

In "Earth...Condemned World!", Daryl Halbert, a scientist tracking planetary albedo, is summoned back to Earth just as his ship is damaged and he's rescued by aliens. They reveal Earth's fading reflectivity will soon cause it to break free from the Sun, becoming a rogue planet threatening the cosmos—and they're coming to destroy it. Given seven hours to find a solution, Halbert uncovers a surprising layer of glassy space dust coating the planet, and a test explosion offers a glimmer of hope for saving Earth and other worlds.

In "Riddle of Asteroid 8794!", Bruce Carlton unravels a mystery tied to a cryptic record catalog number, leading him to an asteroid where Clark Hale is trapped in a crater. With the help of a clever deduction and a hidden clue left by a music-loving eccentric, Carlton and Hale race against time to uncover a buried treasure before Orion Batson can claim it. The story blends sci-fi intrigue with a surprising twist, all set against the silent vastness of space.