Random Sleep Facts

    42 facts tagged with Sleep Facts

    Cows can sleep standing up, but they can only dream lying down.
    745
    You burn more calories sleeping than you do watching television.
    348
    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
    A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
    23
    Lack of water is the #1 trigger of daytime fatigue.
    148
    Bats sleep 18-20 hours per day.
    5
    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
    The strangers in your dreams are actually people that you've seen in real life.
    50