Mysteries of Unexplored Worlds #37

A brilliant but embittered scientist named Proctor Rogg, imprisoned by the government after refusing to sell them his ultimate weapon, begins experimenting with a radiation transmitter that transforms docile animals into savage, aggressive creatures. When his test subjects escape and wreak havoc across Nebraska, law enforcement closes in—but a shocking accident intervenes before Rogg can be stopped. This 1963 tale from *Mysteries of Unexplored Worlds* explores what happens when a genius's revenge spirals beyond his control.

On a primordial world caught between water and land, a webbed creature emerges from the sea—a mutant capable of breathing air—and takes its first tentative steps onto the strange jungle-covered surface. But when a female of its kind pulls the explorer back into the depths, the question lingers: will another million years pass before one of them finds the courage to try again, or will the lizards' reign remain unbroken?

Dr. Hulitt Degnor, a brilliant physicist working on secret space research, becomes convinced that a cat placed in his care is a Soviet spy—and he's determined to prove it using a hidden camera and a carefully orchestrated test. When the feline's suspicious behavior seems to confirm his theory, Degnor takes drastic action, but the real game may be far more complicated than anyone at N.A.S.A. realizes.

Captain Carveth, pilot of a ship from Earth, lands on Mars believing it's a dead world ready for human colonization—until he discovers intelligent humanoid life already thriving there, along with a visiting explorer from Venus. The two explorers must survive the planet's own nightmarish native creatures before returning home with word of a promising new civilization to build. What neither realizes is that the true inhabitants of Mars have been watching and waiting all along, and their plans for the newcomers may be far different from what the explorers imagine.

Ronald Lear, a brilliant physicist tormented by his work developing nuclear weapons, is recruited by a foreign agent and smuggled behind the Iron Curtain—only to discover he's been deceived and trapped in a Soviet laboratory under constant guard. Desperate to escape, Lear devises a dangerous experiment involving radiation and a special chemical bath, leading to a shocking transformation that changes everything he thought he knew about his fate.