
Earth’s greatest minds have vanished one by one into a realm beyond the stars, leaving humanity teetering on the brink of scientific collapse. In a concrete‑walled lab, a lone survivor clutches a mysterious crystal whose glow turns the air green and whose very shape seems to shift between hexagonal and cubical forms. Panic erupts, emergency drills kick in, and the team scrambles to decide whether to flee, contain, or study the object that could be both their salvation and their doom.
Dave Crandall, the only man who has ever touched the crystal, hurls it into a pneumatic tube, triggering a deafening blast that ripples through the labyrinthine corridors and forces the world to confront a new kind of radiation. As the crystal’s strange properties are debated—its potential to power cities or unleash destruction—the story follows the early‑Cold‑War tension between ambition and caution. Listeners will be drawn into a tense, speculative adventure that asks what price humanity will pay for the promise of limitless energy.
Language
en
Duration
~1 hours (61K characters)
Publisher of text edition
Project Gutenberg
Original publisher
United States: Popular Publications, Inc.,1950.
Credits
Greg Weeks, Mary Meehan and the Online Distributed Proofreading Team at http://www.pgdp.net
Release date
2022-11-08
Rights
Public domain in the USA.

1911–1981
A mid-century science fiction writer with a knack for engineering-minded ideas, he became known for stories that mixed radio, electronics, and speculative science. His work appeared widely in the pulp magazine era and helped shape the feel of classic American SF.
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