with many based on the idea of people sleeping for decades or centuries then being awakened from a cryogenic sleep. When cryopreservation first emerged in the 1960s, it was itself a kind of ...

Studies suggest that three out of every four people with sleep paralysis experience some form of hallucination. By definition, sleep paralysis involves hypnopompic hallucinations that occur while you ...

The sleep cycle involves a series of transitional states that repeat themselves throughout the hours that you’re sleeping. It’s not uncommon for people to experience a type of hallucination while ...