40 Facts About Sleep….


*Anything less than five minutes to fall asleep at night means you’re sleep deprived. The ideal is between 10 and 15 minutes, meaning you’re still tired enough to sleep deeply, but not so exhausted you feel sleepy by day.

Scientists have not been able to explain a 1998 study showing a bright light shone on the backs of human knees can reset the brain’s sleep-wake clock.

The “natural alarm clock” which enables some people to wake up more or less when they want to is caused by a burst of the stress hormone adrenocorticotropin. Researchers say this reflects an unconscious anticipation of the stress of waking up.

(via reddit)


  1. I’m really stressed when I wake up, but maybe that’s because of the Grizzly Bear in the corner sharpening his knife while listening to Slayer.

  2. I read !ON THE INTERNET! that there’s, like, ten people in the world who don’t sleep at all. So, I’m questioning the first one.

  3. I checked the “knee” effect ’cause I was a bit skeptical about it. There has apparently been another study to verify the first one of 1998. The results were different.
    Here is the link

  4. Ever have a dream that you actually started to have conscious thought in, like “I really think this is a dream and not reality” ? If you can take a conscious act in a dream and want to confirm its dream status, try and read something. You can’t read things in dreams because the visual centers of your brain and the encode/decode parts of your brain that let you turn letters into words are separate. Only the visual art is working in the dream. Here’s what i mean. Say you are driving a car in your dream and you come to a stop sign. You know that it’s a stop sign because it’s octagonal, red in the center and boardered in a white line with white lettering. Make your “dream self” actually look at the sign and see if it says “STOP”. What you will find is that the lettering is just gibberish. Same if you have a dream that you are reading a newspaper headline that says such and such. You aren’t really reading the paper in your dream. You are looking at the image of a newspaper and you just know what it says. If you can, make yourself actually try and read the headline. Just like the stop sign, it will be meaningless squiggles. You can’t read in dreams.

  5. Toenail: thanks for the link, very interesting.
    Kelly: It’s called lucid dreaming – there’s a ton of stuff ‘out there’ about how to train yourself to be able to do it demand. Also interesting about the reading…

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