"Fessenden's Worlds" / A Weird-Scientific Story by Edmond Hamilton

"Fessenden's Worlds" is a tale of cosmic horror by Edmond Hamilton. The story, which first appeared in Weird Tales in April 1937, was described as follows: “Like a young god, Fessenden created a miniature universe, but his unholy meddling with the lives and destinies of his creations brought about a startling catastrophe…”