Read "After World's End" by Jack Williamson online for free on Textopian. Full text with search, annotations, highlights, and AI-powered reading aids.
Uranium is a strange element, slightly understood. Its atom is the heaviest known. It is the mother of a dozen others, even of magic radium. For its radioactive atom breaks down to form a chain of other elements, but so slowly that only half the mass is consumed in six billion years.
The uranium salts in that drug must have been responsible for my sleep.