Random Sleep Facts

    42 facts tagged with Sleep Facts

    Hypnic Jerk
    Hypnic Jerk
    When you wake up with a jolt, it's called a Hypnic Jerk. This usually happens during the lightest stages of sleep, and can happen as a natural reaction when you fall asleep in a car or airplane.
    35
    Cows can sleep standing up, but they can only dream lying down.
    745
    The higher someone’s I.Q. the more likely they are to be sleep deprived.
    29
    Knocker-Up
    Knocker-Up
    Until the 1920s, there was a profession called 'knocker-up', which involved going from client to client and tapping on their windows (or banging on their doors) with long sticks until they woke up.
    46
    47% of people have a nightmare at least once a month.
    186
    A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
    23
    Some people have a "natural alarm clock" allowing them to wake up when they want. This is actually caused by a burst of the stress hormone adrenocorticotropin.
    15
    Sleeping on the job is acceptable in Japan. It is viewed as exhaustion from working hard. Some people fake it to look committed to their job.
    57