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Nighttime is for horrors and discovering how frightening the world really is. We aren’t talking about ghosts and other paranormal phenomena. They haven't YET been added to the library of proven scary facts. We are here to take a look at the scientifically proven horrors. The ones that we can’t deny or run away from. And unfortunately (or luckily for all you dark copers out there), there are many creepy facts about humans and the Earth we live on.

Human bodies might work in creepy ways, but they can’t beat the frightening things our minds have done. For example, one of the scariest facts on our list touches upon the horror movie Poltergeist. This might come as a shocker to you, but the corpses you saw in the movie — those were actual human remains. With this scary fact in mind, you might watch the movie from a different perspective. Or never watch it again.

However, to truly make your sleep feel more like a nightmare, you should know the dark facts about Earth and its inhabitants. Crows, for example, can remember and recognize human faces. On the other hand, some scary facts touch upon geography. Mount Everest, the highest mountain above sea level, is also the world’s highest graveyard. Approximately 150 bodies are resting on this giant of a mountain. All of whom will likely never be recovered.

Ready to get scared? If so, turn off the lights, cozy up in your bed, and delve into the scary and disturbing facts we have compiled below. Also, we advise you to stick till the end because, throughout the post, we explore how scary facts affect sleep and why the ocean might be the most terrifying place on Earth!

This post may include affiliate links.

#1

30 Scary Facts That Will Give You The Heebie-Jeebies Crows can recognize and remember human faces.

onlinelibrary.wiley.com , Tom Swinnen Report

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Why Dark Facts Are Scarier at Night?

Horror and darkness mix rather perfectly. Scary facts can evoke terror and horror because that’s simply how our brain works. Creativity plays an important part here because we start to imagine fictitious things. Our minds start imagining things that are simply not there… or are they?

Imagine for a moment a situation. You are in your room, alone in the house. You start reading through some dark facts we have compiled. You brush them off as “goofy” and “not scary.” But your ears pick up noises outside your door. You start thinking, “What was it?”, “Who made those sounds?” and your body trembles. That’s because your brain has been hijacked by fear.

Both horror movies and games work on the same principle. However, scary facts are way more interesting because they’re true to the bone. Thus, if you are looking for a quick pass to a nightmarish night — these facts are the way to go. 
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    #2

    30 Scary Facts That Will Give You The Heebie-Jeebies Tooth-in-the-Eye Surgery. Surgeons put a tooth in a blind person’s eye to restore their sight. It was pioneered in the 1960s, and it actually works and it’s still being done today.

    eyewiki.aao.org , Lisa Fotios Report

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    #3

    30 Scary Facts That Will Give You The Heebie-Jeebies Real corpses were used in the 1982 film Poltergeist.

    snopes.com , imdb Report

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    #4

    30 Scary Facts That Will Give You The Heebie-Jeebies There are bodies of over 150 dead hikers on Mount Everest, and they’are used as landmarks.

    smithsonianmag.com , David Waschbüsch Report

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    #5

    30 Scary Facts That Will Give You The Heebie-Jeebies The Turritopsis Dohrnii jellyfish is officially known as the only immortal creature in the world. It lives forever.

    amnh.org , Pawel Kalisinski Report

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    corneliousclemonts avatar
    Do i have to?
    Do i have to?
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    2 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    I learned this from the octonauts!

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    scagsy77 avatar
    $cagsy
    $cagsy
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    2 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    Which is nice and all that, but how do we know? For instance, I'm immortal too. So far, so good.

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    Melody Machala
    Melody Machala
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    2 years ago (edited) DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    IKNOW THIS ONE!!!!!! So once they get old they basically turn back into a young jellyfish and that goes on until they get eaten

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    cc_6 avatar
    C C
    C C
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    2 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    They've actually been doing studies and experiments to see if the properties of the jellyfish DNA or something can be used to regenerate human cells particularly for Alzheimer's. It's really fascinating stuff.

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    Mark Fuller
    Mark Fuller
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    2 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    I disagree. I suspect Cher is immortal. She's had so much plastic surgery only Cher and cockroaches would likely survive a nuclear war!

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    the_mysterious_lady_analyn avatar
    Analyn Lahr
    Analyn Lahr
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    2 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    But can you kill it? And if it can be killed, is it truly immortal? Where does the definition start?

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    Anthorn
    Anthorn
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    1 month ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    Key note: it CAN live forever if left to its own biology. They're most likely to die from predators or illness.

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    Eliana Frank
    Eliana Frank
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    1 year ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    Try tardigrades, everyone. They can legitimately survive ANYTHING including SPACE.

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    Richard Graham
    Richard Graham
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    2 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    Home Sapein is officially known as the only immoral creature in the world.

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    Łukasz Mirosław
    Łukasz Mirosław
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    2 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

    Not the only. Other jellyfish, Aurelia Aurita and Laodicea Undulata, share it's ability to reverse their development when needed.

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    #6

    30 Scary Facts That Will Give You The Heebie-Jeebies Climate change is making spiders bigger.

    royalsocietypublishing.org , Anthony Report

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    #7

    30 Scary Facts That Will Give You The Heebie-Jeebies A haunted radio station from Russia has been broadcasting a dull monotonous tone for twenty-four hours a day, seven days a week, for the last three-and-a-half decades. Every few seconds it’s joined by a second sound, like some ghostly ship sounding its foghorn.

    bbc.com , Zeynep M Report

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    How Do Disturbing Facts Impact Our Sleep?

    Knowing why disturbing facts are scary, you might want to understand how they impact your sleep schedule. It’s not a myth that horror genre-related stuff (scary facts included) worsens sleep. However, to prove the myth practically, watch a horror movie or read some terrifying facts before sleep. The likely outcome is that fear will kick your fight-or-flight response into overdrive, signaling the body to release adrenaline (if you get scared, of course).

    If you missed a few biology classes, adrenaline is a hormone our bodies produce. It’s usually released in dangerous or stressful situations. It activates our “fight or flight” response and keeps the body on high alert. Truly horrific facts, when read at night, will quickly trigger the production of this hormone.

    High alert mode can heavily disturb your sleep because adrenaline keeps you up and makes you feel moody and slightly annoyed. So, the next time you decide to read a scary collection of facts, don’t expect to fall asleep early. Just make sure to get around 8 hours of sleep the next day.
    #8

    30 Scary Facts That Will Give You The Heebie-Jeebies Dogs like squeaky toys because they mimic the screams of their prey.

    sciencedirect.com Report

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    #9

    30 Scary Facts That Will Give You The Heebie-Jeebies Two Scottish surgeons originally invented the chainsaw to assist childbirth.

    ncbi.nlm.nih.gov , Karolina Gabrowska Report

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    #10

    30 Scary Facts That Will Give You The Heebie-Jeebies Spiders can survive in space.

    nasa.gov , Pixabay Report

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    #11

    30 Scary Facts That Will Give You The Heebie-Jeebies Locked-In Syndrome is a condition in which a patient is fully aware but is stuck in a coma-like state.

    rarediseases.info.nih.gov , RDNE Stock Project Report

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    #12

    30 Scary Facts That Will Give You The Heebie-Jeebies The film 'A Nightmare on Elm Street' is based on a real story reported in the LA Times. A boy was terrified to go to sleep, and when he did, he died while screaming about a nightmare.

    latimes.com , imdb Report

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    #13

    30 Scary Facts That Will Give You The Heebie-Jeebies While Ted Bundy was a psychology major at the University of Washington, he worked at Seattle's Suicide Hotline Crisis Center.

    distractify.com , bryce carithers Report

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    #14

    30 Scary Facts That Will Give You The Heebie-Jeebies Ducklings can engage in cannibalistic behaviors when they're bored.

    dpi.nsw.gov.au , Pixabay Report

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    #15

    30 Scary Facts That Will Give You The Heebie-Jeebies When you die the last sense to leave your body is the ability to hear.

    ncbi.nlm.nih.gov , Pavel Danilyuk Report

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    #16

    30 Scary Facts That Will Give You The Heebie-Jeebies More than 80% of our ocean is unmapped, unobserved, and unexplored.

    oceanservice.noaa.gov , Francesco Ungaro Report

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    How Many Creepy Things Are in the Ocean?

    Humans are natural explorers. Thus, something we can’t explore gets shrouded in mystery. The more mysterious the place — the creepier it is. You might not know it, but only 20% of the ocean has been explored. Thus, it’s no wonder why so many creepy things and facts come from this place.

    While we might label space as the most mysterious thing, that title goes to the oceans. With 80% of the ocean still unexplored, what we know now is already creepy. For more creepiness, check out creatures found in the deep seas. It’s a guaranteed way to get a mild case of insomnia.

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    So, regarding how many scary things are in the ocean, the answer is simple — a lot already, and much more hidden. Someday, we might explore 100% of the ocean. By that time, we will be indeed frightened to our cores.
    #17

    30 Scary Facts That Will Give You The Heebie-Jeebies Technically it’s not impossible to die from holding in a sneeze. Some injuries from holding in a sneeze can be very serious, such as ruptured brain aneurysms, ruptured throat, and collapsed lungs.

    healthline.com , Andrea Piacquadio Report

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    #18

    30 Scary Facts That Will Give You The Heebie-Jeebies Horned Lizards can defend themselves by squirting blood out of their eyes.

    asknature.org , Room237 CC AS-A A 3.0 U Report

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    #19

    30 Scary Facts That Will Give You The Heebie-Jeebies Mobile phones are 10 times dirtier than a toilet seat.

    ncbi.nlm.nih.gov , Teddy Yang Report

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    #20

    30 Scary Facts That Will Give You The Heebie-Jeebies Alien hand syndrome is a phenomenon in which one hand is not under control of the mind. The person loses control of the hand, and it acts as if it has a mind of its own.

    ncbi.nlm.nih.gov , hansskuy Report

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    #21

    30 Scary Facts That Will Give You The Heebie-Jeebies King Charles II drank alcohol mixed with pulverized human skulls.

    smithsonianmag.com , Polina Tankilevitch Report

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    #22

    30 Scary Facts That Will Give You The Heebie-Jeebies Some ants turn into zombies via parasitic fungus which manipulates their brains.

    livescience.com , Egor Kamelev Report

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    #23

    30 Scary Facts That Will Give You The Heebie-Jeebies Arrhythmic death syndrome is a sudden condition where someone seemingly healthy dies suddenly with no apparent cause of death.

    sads.org.uk , Brett Sayles Report

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    #24

    30 Scary Facts That Will Give You The Heebie-Jeebies 250,000 deaths a year are due to medical errors.

    npr.org , Dalila Dalprat Report

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    #25

    30 Scary Facts That Will Give You The Heebie-Jeebies During the mummification process, Ancient Egyptians remove the brain through one of the nostrils.

    science.howstuffworks.com , Miguel Á. Padriñán Report

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    #26

    30 Scary Facts That Will Give You The Heebie-Jeebies People with Cotard's syndrome believe that parts of their body are missing, or that they are dying, dead, or don’t exist. They may think nothing exists.

    webmd.com , cottonbro Report

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    #27

    30 Scary Facts That Will Give You The Heebie-Jeebies Criminologists estimate that there's a 1-in-3 chance police will never identify your killer if you're murdered in the US.

    npr.org , Tima Miroshnichenko Report

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    #28

    30 Scary Facts That Will Give You The Heebie-Jeebies Fatal familial insomnia makes it impossible for someone to sleep for months.

    rarediseases.org Report

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    #29

    30 Scary Facts That Will Give You The Heebie-Jeebies You’re more likely to die on your birthday. The chance someone will die on their birthday is 6.7 percent, which is higher than any other day.

    sciencedirect.com , Marina Utrabo Report

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    #30

    30 Scary Facts That Will Give You The Heebie-Jeebies Some female spiders allow their young to eat them alive.

    sciencedirect.com , Pixabay Report

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    #31

    In some European cultures it was customary to place the dried or desiccated body of a cat inside the walls of a newly built home to ward off evil spirits or as a good luck charm.

    jstor.org Report

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    #32

    Humans produce about 1.5 quarts of mucus every day.

    health.ucsd.edu Report

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    #33

    Indian followers of the Zoroastrianism don't bury or burn their dead. Instead, they leave the bodies exposed to the rays of the sun, and the corpse is consumed or devoured by birds of prey — vultures, kites, crows.

    npr.org Report

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    #34

    Over 20% of children report hearing voices.

    rte.ie Report

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    #35

    An estimated 6.5 million people in the United States have an unruptured brain aneurysm, or 1 in 50 people.

    bafound.org Report

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    #36

    The U.S. military is missing six nuclear weapons.

    nationalinterest.org Report

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    #37

    Based on a 2006 report by the National Academies of Science’s Institute of Medicine, in the U.S. alone poor handwriting on prescription notes leads to over 7,000 deaths and 1.5 million medical errors.

    ncbi.nlm.nih.gov Report

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    #38

    Despite making up close to 5% of the global population, the U.S. has more than 20% of the world’s prison population.

    aclu.org Report

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    #39

    Decorations made from human bones adorn the interior of the Sedlec Ossuary.
    The “Bone Church” contains the bones of around 40,000 different people. These bones are all arranged in different forms, such as garlands, altars, and even a chandelier.

    unesco.org Report

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    #40

    A homicide archivist Thomas Hargrove estimates that there are over 2,000 serial killers at large right now.

    newyorker.com Report

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    #41

    The Pirates of The Caribbean ride at Disneyland used to have real skeletons as props. When it was first built in the 1960s, designers asked UCLA’s anatomy department for authentic materials. The real skeletons have since been given a proper burial.

    atlasobscura.com Report

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    #42

    'A Sense Of Impending Doom' is frequently reported by patients as an early sign of mismatched blood type transfusion.

    ncbi.nlm.nih.gov Report

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    #43

    At least 20 detached human feet have been found on the coasts of the Salish Sea since 2007.

    nationalgeographic.com Report

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    #44

    In the early-to-mid 1980s, years after AIDS was known to be in Canada (1982), the Canadian Red Cross wasn’t screening donated blood for HIV. About 2,000 Canadians were infected with HIV from tainted blood products.

    ncbi.nlm.nih.gov Report

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    #45

    When we die, the enzymes and bacteria that were so useful to us digest us from the inside out.

    ncbi.nlm.nih.gov Report

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    #46

    Many crocodile species can gallop, and they are fast.

    sciencealert.com Report

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    #47

    In the 1920’s, the American domestic terror group the Ku Klux Klan had a youth chapter called the “Ku Klux Kiddies.”

    history.com Report

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    #48

    Depression-era craze of Dance Marathons in which couples would compete to see who could dance the longest, often for cash prizes, unfortunately led to some people dropping dead from exhaustion on the dance floor.

    jstor.org Report

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    #49

    A human head remains conscious for around 20 seconds after being decapitated.

    sciencealert.com Report

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    #50

    Harvard owns a book that's bound in human skin.

    bbc.com , blogs.law.harvard.edu Report

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    #51

    "Brain-eating" amoeba has infected at least 40 people in the U.S. over the past decade. The single-celled organisms go by the scientific name Naegleria folweri, and may infect people who swim in lakes or rivers.

    cdc.gov Report

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    #52

    A chicken named Mike lived for 18 months after his head had been cut off.

    miketheheadlesschicken.org Report

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    #53

    On average, a person can secrete 26 gallons of sweat into a bed per year.

    researchgate.net Report

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    #54

    If the sun blew up right now, you wouldn't know about it for another eight minutes.

    scienceline.ucsb.edu Report

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    #55

    H. H. Holms, America’s first serial killer, constructed a “Murder Castle,” a hotel with secret compartments and gas chambers to murder unsuspecting visitors of the Chicago World Fair. He confessed to 27 murders.

    crimemuseum.org Report

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    #56

    More than 99% of the four billion species that have evolved on Earth are now gone.

    ourworldindata.org Report

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    #57

    People used hollowed human skulls as bowls and cups back in ancient England.

    journals.plos.org Report

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    #58

    The average bed has between 100,000 and 10 million dust mites.

    mayoclinic.org Report

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    #59

    Tarantulas have been found to "swim" in both the wild and in captivity.

    animalhype.com Report

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    #60

    John Douglas, a former chief of the FBI’s Elite Serial Crime Unit and author of Mind Hunter notes that “A very conservative estimate is that there are between 25 and 50 active serial killers in the United States” at any given time.

    books.google.com Report

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    #61

    The last use of a guillotine in France was the same year the first Star Wars movie premiered. 1977

    history.com Report

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    #62

    Fifteen percent of the air you breathe in a metro station is human skin.

    ncbi.nlm.nih.gov Report

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    #63

    Vampire moths feed on the blood of mammals, including humans. They can suck blood for up to 50 minutes.

    entomologytoday.org Report

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    #64

    Your pets might eat you when you die, and perhaps a bit sooner than is comfortable.

    journals.lww.com Report

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    #65

    Your jaw is strong enough to crush your own teeth with its pressure.

    royalsocietypublishing.org Report

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    #66

    Emperor Nero profited off of human urine. Emperor Nero imposed a urine tax, charging merchants who sold urine.

    gutenberg.org Report

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    #67

    The Asian giant hornets have a bite that can leave craters in the skin or even cause death.

    psu.edu Report

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    #68

    Rodents' teeth grow continuously throughout their lives.

    sciencedirect.com Report

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    #69

    Babies can grow mustaches in the womb that then spread to cover their entire body in hair called Lanugo. The body hair keeps them warm and helps regulate body temperature. Don’t worry, they shed it before birth.

    pubmed.ncbi.nlm.nih.gov Report

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    #70

    Your skeleton is always wet.

    ncbi.nlm.nih.gov Report

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    #71

    It’s very possible your office coffee mug has fecal matter on it.

    agris.fao.org Report

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    #72

    NASA astronaut will consume about 730 liters of recycled urine and sweat during his yearlong mission.

    nasa.gov Report

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    #73

    Ancient Romans believed that drinking blood would let them absorb power.

    pubmed.ncbi.nlm.nih.gov Report

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    #74

    Women in the 18th century used lead as makeup. This makeup contains vinegar, water, and white lead, which was the pigment that gave the mixture its color.

    theconversation.com Report

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    #75

    About 40 supervolcanoes are dotted across the globe and we're about 24,000 years overdue for an eruption.

    bbc.co.uk Report

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    #76

    The “sleepwalking defense” has been used in order to have defendants acquitted for murder.

    apa.org Report

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    #77

    Aztec priests believed that human sacrifices could stop droughts and famine.

    history.com Report

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    #78

    For centuries, doctors thought that medicines made with human flesh, blood, or bone could be effective in curing all kinds of ailments, from epilepsy to headaches. This practice was called “corpse medicine.”

    historyextra.com Report

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    #79

    Botflies are a type of insect whose larvae burrow under your skin.

    sciencedirect.com Report

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    #80

    “The Devil’s Bible” is a real thing, and it’s a contract between a monk and Satan.

    Codex Gigas, “The Devil’s Bible” is the largest Latin manuscript known to the world. It contains a full-page portrait of Satan. People believe the manuscript contains the contract of a monk who sold his soul to Satan in the 13th century in order to escape execution.

    loc.gov Report

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    #81

    In a month, we ingest the weight of a 4x2 Lego brick in microplastic.

    news.trust.org Report

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    #82

    Lady Bugs larvae use cannibalism as a survival tactic. Lady Bugs are known to eat their own larvae to ensure the survival of the other larvae. Think of it as population control on a smaller scale.

    biomedcentral.com Report

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    #83

    The Champawat Tiger was responsible for an estimated 436 deaths in Nepal and the Kumaon division of India, during the last years of the 19th century and the first years of the 20th century.

    bbc.com Report

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    #84

    A person will shed around 40 pounds of skin in a single lifetime. Just like snakes, humans shed their skin too, but at a much slower pace. Accumulated, however, your shed skin will amount to almost half the average body weight.

    pubmed.ncbi.nlm.nih.gov Report

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    #85

    Some species of fish have human-like teeth.

    Report

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    #86

    Microscopic mites can be found in bunches at the base of your eyelashes.

    webmd.com Report

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    #87

    In the 1800s, dentures were made out of the real teeth of deceased people.

    bda.org , bda.org Report

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    #88

    'Foot binding' practice in China only started to decline in the 20th century.

    historyofyesterday.com Report

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    #89

    The FDA allows up to 4% of a can of cherries to have maggots (and 5% if they are brined or Maraschino).

    fda.gov Report

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    #90

    More than 80 million bacteria can be exchanged in one kiss.

    microbiomejournal Report

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    #91

    The golden poison frog has enough poison to kill 10 to 15 people. Its skin is coated in a deadly poison called alkaloid toxin. One milligram of this poison can kill around 10 to 15 humans.

    nationalgeographic.com Report

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    #92

    4,400 Unidentified bodies are recovered each year with approximately 1,000 of those bodies remaining unidentified after one year.

    namus.nij.ojp.gov Report

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    #93

    18th-century doctors believed that bloodletting was mandatory to “balance” patients' health.

    medicalnewstoday.com Report

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    #94

    Research has shown that after decapitation there is still activity in the brain for 4 to 30 seconds.

    pubmed.ncbi.nlm.nih.gov Report

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    #95

    The peanut butter contains an average of 1 or more rodent hairs per 100 grams.

    fda.gov Report

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    #96

    Being buried alive accidentally occurred so often that people invented “safety coffins.” Doctors often misdiagnosed ill patients, and this was common in 17th century England.

    smithsonianmag.com Report

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    #97

    Cosmologists theorize the constant expansion of the universe could cause it to tear apart. This theory is called The Big Rip.

    americanscientist.org Report

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    #98

    Scientists say 'black holes' exist in the ocean.

    cambridge.org Report

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    #99

    A body decomposes four times faster in water than on land.

    ncbi.nlm.nih.gov Report

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