Astounding Stories, April, 1931

Step into a vault of early twentieth‑century imagination where daring scientists and intrepid explorers push the boundaries of what is possible. In one tale three Earthmen are recruited for a secretive midnight launch to Mars, confronting the temptation of ancient Martian schemes. Another story launches a physicist into an unseen vibrational dimension, where love and peril intertwine in magnetic fields.

The issue also offers a chilling adventure deep beneath the Earth, as a gleaming metal sphere carries hostile visitors into a subterranean cavern, and a frozen polar expedition discovers a pool of living white fire that defies logic. A daring interplanetary patrol records a harrowing clash with monstrous beings on a distant moon, while a fresh alien jungle teems with unimaginable predators. Together these vivid, fast‑paced narratives capture the awe and anxiety of an era dreaming of the stars.