Cautionary tales in science fiction are warning us about turning sleep into a commodity. Here's why some of those fears ...

The genre of science fiction has a lot to say about sleep. Here are 11 great stories, from TV, film and books.

Imagine waking up in pitch darkness to a slavering monster with blood dripping down its fangs. You try to cry out for help but can’t. You're paralyzed from head to toe! Sleep paralysis—paralysis upon ...