Have you heard the saying about “sleeping with one eye open”? It’s a bit of metaphoric advice about staying vigilant—and a way to describe very light restless sleep. But sleeping with eyes open is ...

This story was originally published by CalMatters. Sign up for their newsletters. If you’re serving hard time inside a California prison, you’ll often find yourself stuck in a cramped cell with a ...

Some animals do it for survival, while others have evolved this ability for different reasons. It might seem strange, but these animals have developed abilities to rest while staying alert to their ...

When Ryan Barrett was living with a man who would later be accused of murder, it came to a point when he locked and blocked his bedroom door before "sleeping with one eye open." Sofia Saric is a ...

If you're serving hard time inside a California prison, you'll often find yourself stuck in a cramped cell with a complete stranger. You hang a bedsheet to manufacture the semblance of privacy between ...