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Dreams — Mysterious, bewildering, eye-opening and sometimes a nightmarish living hell. Dreams are all that and much more.

Here are 20 amazing facts about dreams that you might have never heard about:

Fact #1: You can't read while dreaming, or tell the time

If you are unsure whether you are dreaming or not, try reading something. The vast majority of people are incapable of reading in their dreams.

The same goes for clocks: each time you look at a clock it will tell a different time and the hands on the clock won't appear to be moving as reported by lucid dreamers.

Fact #2: Lucid dreaming

There is a whole subculture of people practicing what is called lucid or conscious dreaming. Using various techniques, these people have supposedly learned to assume control of their dreams and do amazing things like flying, passing through walls, and traveling to different dimensions or even back in time.

Want to learn how to control your dreams? You can try these tips:

Lucid Dreaming: This Is How You Can Control Your Dreams

Fact #3: Inventions inspired by dreams

Dreams are responsible for many of the greatest inventions of mankind. A few examples include:

The idea for Google -Larry Page
Alternating current generator -Tesla
DNA's double helix spiral form -James Watson
The sewing machine -Elias Howe
Periodic table -Dimitri Mendeleyev

…and many, many more.

Fact #4: Premonition dreams

There are some astounding cases where people actually dreamt about things which happened to them later, in the exact same ways they dreamed about.

You could say they got a glimpse of the future, or it might have just been coincidence. The fact remains that this is some seriously interesting and bizarre phenomena. Some of the most famous premonition dreams include:

Abraham Lincoln dreamt of His Assassination
Many of the victims of 9/11 had dreams warning them about the catastrophe
Mark Twain's dream of his brother's demise
19 verified precognitive dreams about the Titanic catastrophe

Fact #5: Sleep paralysis

Hell is real and it is called sleep paralysis. It's the stuff of true nightmares. I've been a sleep paralysis sufferer as a kid and I can attest to how truly horrible it is.

Two characteristics of sleep paralysis are the inability to move (hence paralysis) and a sense of an extremely evil presence in the room with you. It doesn't feel like a dream, but 100% real. Studies show that during an attack, sleep paralysis sufferers show an overwhelming amygdala activity. The amygdala is responsible for the "fight or flight" instinct and the emotions of fear, terror and anxiety. Enough said!

Fact #6: REM sleep disorder

In the state of REM (rapid-eye-movement) stage of your sleep your body is normally paralyzed. In rare cases, however, people act out their dreams. These have resulted in broken arms, legs, broken furniture, and in at least one reported case, a house burnt down.

Fact #7: Sexual dreams

The very scientifically-named "nocturnal penile tumescence" is a very well documented phenomena. In laymen's term, it simply means that you get a stiffy while you sleep. Actually, studies indicate that men get up to 20 erections per dream.

Fact #8: Unbelievable sleepwalkers

Sleepwalking is a very rare and potentially dangerous sleep disorder. It is an extreme form of REM sleep disorder, and these people don't just act out their dreams, but go on real adventures at night.

Lee Hadwin is a nurse by profession, but in his dreams he is an artist. Literally. He "sleepdraws" gorgeous portraits, of which he has no recollection afterwards. Strange sleepwalking "adventures" include:

A woman having sex with strangers while sleepwalking
A man who drove 22 miles and killed his cousin while sleepwalking
A sleepwalker who walked out of the window from the third floor, and barely survived

Fact #9: Dream drug

There are actually people who like dreaming and dreams so much that they never want to wake up. They want to continue on dreaming even during the day, so they take an illegal and extremely potent hallucinogenic drug called Dimethyltryptamine. It is actually only an isolated and synthetic form of the chemical our brains produce naturally during dreaming.

Fact #10 Dream-catcher

The dream-catcher is one of the most well-known Native American symbols. It is a loose web or webs woven around a hoop and decorated with sacred objects meant to protect against nightmares.

Fact #11: Increased brain activity

You would associate sleeping with peace and quiet, but actually our brains are more active during sleep than during the day.

Fact #12: Creativity and dreams

As we mentioned before, dreams are responsible for inventions, great artworks and are generally just incredibly interesting. They are also "recharging" our creativity.

Scientists also say that keeping a dream diary helps with creativity.

In rare cases of REM disorder, people actually don't dream at all. These people suffer from significantly decreased creativity and perform badly at tasks requiring creative problem solving.

Fact #13: Pets dream too

Our animal companions dream as well. Watch a dog or a cat sleep and you can see that they are moving their paws and making noises like they were chasing something. Go get 'em buddy!

Fact #14: You always dream—you just don't remember it

Many people claim that they don't dream at all, but that's not true: we all dream, but up to 60% of people don't remember their dreams at all.

Fact #15: Blind people dream too

Blind people who were not born blind see images in their dreams but people who were born blind don't see anything at all. They still dream, and their dreams are just as intense and interesting, but they involve the other senses beside sight.

Fact #16: In your dreams, you only see faces that you already know

It is proven that in dreams, we can only see faces that we have seen in real life before. So beware: that scary-looking old lady next to you on the bus might as well be in your next nightmare.

Fact #17: Dreams tend to be negative

Surprisingly, dreams are more often negative than positive. The three most widely reported emotions felt during dreaming are anger, sadness and fear.

Fact #18: Multiple dreams per night

You can have up to seven different dreams per night depending on how many REM cycles you have. We only dream during the REM period of sleep, and the average person dreams one to two hours every night.

Fact #19: Gender differences

Interestingly, 70% of all the characters in a man's dream are other men, but women's dream contain an equal amount of women and men. Also men's dreams contain a lot more aggression. Both women and men dream about sexual themes equally often.

Fact #20: Not everyone dreams in color

As much as 12% of people only dream in black and white.

Featured photo credit: Unsplash via unsplash.com