65+ Scary Facts That Will Absolutely Give You Nightmares (2023)

Hey, freaks! If you’re here, you likely enjoy being frightened or weirded out. Maybe scary things just don’t give you goosebumps. Maybe you can look at bugs crawling over a body all day and not feel itchy and uncomfortable. You might even find Halloween things funny. If so, congratulations: You’re a flippin’ psychopath. Just collecting these scary facts and interesting trivia left us with the heebie-jeebies. Everyone has their kryptonite.

Maybe true crime shows have you asking your boyfriend to hold your hand on midnight trips to the loo. Perhaps even the sight of Britney Spears with the ginormous banana yellow snake left you covering your eyes and begging someone to change the channel. Maybe you’re quietly obsessed with that la lechuza myth. Whatever weird-assed thing makes you squirm, we guarantee there’s something on this list of scary facts that will freak you out and will make for a terrifying game night. That’s obviously your kind of thing or you wouldn’t have clicked the link. Enjoy your willies.

Warning: This stuff is some combination of gross, haunting, or paranoia-inducing. You’re on your own with any lasting issues caused by these facts. But if you want even more creepiness in your life, check out our eerie pages on short scary stories, weird facts, and more.

Scary Facts to Make Your Skin Crawl

1. Humans shed skin too. Like, a lot of skin. According to the WHO (World Health Organization) and recent studies, the average person will shed roughly 112 pounds of skin in their lifetime.

2. We could solve American homelessness easier than you think. On average, there are over 17,000,000 vacant homes in America at any given time. Meanwhile, according to EndHomelessness.org, there are roughly half a million homeless people in the states. We have enough vacant homes to give each homeless person several homes.

3. Your cellphone is more disgusting than a public toilet. Your cellphone has 10 times more bacteria on it than the average public restroom. Groooooss.

4. Our doctors may be killing us. Okay, that was dramatic. Please, if you feel like something is wrong — go see a health professional. But, it’s interesting (read: terrifying) to know that roughly 250,000 deaths are caused by medical error each year.

5. We’ve found the most terrifying defense mechanism. Horned lizards squirt blood from their eyes as a defense mechanism.

6. You could be trapped in a coma-like state and be aware of it. Locked-in Syndrome might just be the most terrifying medical condition. It’s when you’re stuck between being asleep and awake. You know you’re awake and can hear and see things around you. However, can’t talk and can only move your eyes, so you’re unable to respond to anything.

7. Your cat may sense when you’re dying. A pet cat, named Oscar, resided in a nursing home and was believed to be able to tell when one of the residents would soon die. He’d sleep beside them until they passed.

8. Rat Kings are real (and even harder to look at than the Tiger King). When a group of rats living in close quarters get their tails tangled together (this can happen for many reasons), they’re called a “rat king.”

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9. Never say you’re being “eaten alive” by mosquitos, again. That was an actual method of execution. Scaphism was an ancient form of torture and execution where you’d cover someone with honey, stick them in a hollowed log, and let nature run its course.

10. Pine trees have proven that they can grow inside the body. Doctors recently went into surgery to remove what they thought was a tumor. It turned out to be a fir tree growing in the man’s lungs.

11. There might be a haunted Russian radio station. UVB-76 is a low-frequency radio station that has been broadcasting since 1982. No one knows where the broadcast is originating. It’s mostly just a buzzing noise with an occasional Russian voice transmission.

12. Your child is exactly as creepy as you think they are. Twenty percent of children report hearing voices. It could be imaginary friends. Or…

13. Attack of The Killer Bees might not be too far from the truth. The Japanese giant hornet has venom so powerful, it’s said to “melt” human flesh.

14. One-third of murders go unsolved in the United States. Is there anything else that needs to be said?

15. More than 80 million bacteria are exchanged in a single kiss. Think about that next time you give your date a kiss. Is it really worth it?

16. There was a chicken called Mike the Headless Chicken that lived for 18 months after its head was cut off.

17. Babies 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.

18. It takes the death of 27,000 trees daily to make toilet paper for humans.

19. Mice and rats can spread at least 35 different diseases to humans. These infections include salmonellosis, hantavirus, and rat-bite fever.

20. Crows are so intelligent they can recognize a human face. So don’t get one mad, okay?

21. We all have teeny tiny mites living on our eyelashes.

22. The Catacombs of Paris hold the bones and remains of nearly six million people.

23. The Pacu fish from South America has human-like teeth. Yeah, stuff of nightmares.

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24. With all the explosions, movement, combustion, and mayhem, the universe is still completely silent. That’s because there’s no air for the sound to travel through vibrations as it does on Earth.

25. An astronaut’s footprint on the moon can remain there for a million years.

26. You can actually fit all the planets in the Solar System (sorry, not you Pluto) in the space between the Earth and the Moon. Think about that one.

27. According to the Science journal back in 2015, an average of 4.8 and 12.7 million tonnes of plastic enter the oceans every year.

28. According to DoSomething.org, 1.2 trillion gallons of sewage, stormwater, and industrial waste are dumped into US water every year.

29. There exists in the Czech Republic a small Roman Catholic chapel called the Sedlec Ossuary. What makes this church different? Its decorations are made from human bones. The ossuary is estimated to hold the skeletons of 40,000 to 70,000 people.

30. If you thought the Poltergeist movies were terrifying, wait until you hear what happened after they were filmed. Legend of a curse plagues the franchise due to four deaths among the cast: Dominique Dunne (Dana Freeling), Heather O’Rourke (Carol Ann Freeling), Will Sampson (Taylor, good spirit), and Julian Beck (Kane, evil spirit). Dunne, who was 22 at the time, tragically died at the abusive hands of her boyfriend. And O’Rourke was only 12 when she died unexpectedly from septic shock caused by a bowel obstruction.

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

32. The Pirates of the Caribbean ride at Disneyland is iconic, but its history is a little spooky. When the ride was first built in the 1960s, fake skeletons looked, well, really fake. Disney’s Imagineers (aka “imaginative” “engineers”) weren’t satisfied, so they reached out to UCLA’s anatomy department for the real deal. As technology improved and fake skeletons began to look more authentic, the real skeletons were reportedly given a proper burial.

33. Want to visit the most haunted island in the world? You’ll have to travel to Italy. Poveglia reportedly holds the title, attributed largely to the fact that massive numbers of people dying of the plague were quarantined there in the 18th century. It was also used at one point as a mental asylum.

34. Before the advent of cups and bowls, people in ancient England used hollowed-out human skulls to hold their food and drink.

35. In 2017, homicide archivist Thomas Hargrove estimated that there are more than 2,000 serial killers currently at large.

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36. Got climate change deniers in your life? Tell them that 2019 ​was the second warmest year on record. And not just that, the five warmest years between 1880 and 2019 have all been since 2015.

37. It would only cost the United States $140​ billion per year to make changes to adapt to our warming climate. Just as a comparison, the U.S. spent $718.69 billion on its military in 2019 alone.

38. The golden poison dart frog (Phyllobates terribilis) is the size of a paperclip, adorable, and can kill you with a single touch. In fact, just one frog has enough lethal poison in its skin to kill 10 to 15 people.

39. 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.

40. Pigs can eat an entire human body, mostly because they’ll just eat anything.

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

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

43. Within three days of death, the enzymes from your digestive system begin to digest your body.

44. When a person dies, their sense of hearing is the last to go.

45. Dead bodies swell up like balloons after about four days, due to the release of gases and liquids.

46. When the movie trailer for The Exorcist first came out in theaters, people were so scared, they ran out of the room. Eventually, they stopped playing the trailer in theaters.

47. The Japanese Hornet is one of the largest and most venomous hornets in the world. A sting from this bug can result in kidney failure.

48. There is such a thing as homicidal sleepwalking. It’s also called homicidal somnambulism, or sleepwalking murder. In 2005, Jules Lowe was acquitted of murder after killing his father because he was sleepwalking during the crime.

49. A rat’s teeth can gnaw through substances as hard as lead sheeting and cinder block.

50. We’ve come a long way when it comes to maternity care. Did you know chainsaws were originally created for childbirth? Before caesareans were perfected, if babies were too big to pass through the birth canal, a chainsaw was used to removed parts of the pelvis quickly.

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51. There are about 25 to 50 active serial killers in the United States.

52. In 1973, two men in a small submarine experienced a malfunction in the sub. There, 1575 deep in the ocean, water started flooding in. The sub slowly started sinking. Although the men were able to radio for help, they knew they only had enough oxygen to survive for three days. When the rescue team finally found them, they only had 12 minutes of oxygen left. Talk about a close call!

53. So, you checked out our dinosaur coloring pages and now you have them — and their ultimate extinction — on your mind. But did you know the demise of the dinosaurs was only one of five great extinction events in life’s history on earth? That’s right, in the last 500 million years there have been catastrophic mass extinctions that came this close to eliminating all life from Earth. In fact, per National Geographic, 99 percent of all life forms to have ever lived on our planet are now extinct. Not scary enough? Scientists predict humans might cause the sixth great extinction.

54. Until the 20th century, human remains were used in the making of medicine. Before you gag and throw your phone or laptop across the room, here are the details: Per Medium, it was thought that ingesting powdered remains of certain organs would help with pain or ailments in that part of the body. For example, the crushed and powdered skull remains of a deceased person to cure headaches.

55. A book written 14 years before the 1912 sinking of the Titanic may have predicted the ship’s tragic demise. The novella titled The Wreck of the Titan: Or, Futility was about an “unsinkable” ship hit by an iceberg. The Titan (hello coincidence?) also had a shortage of lifeboats like the Titanic.

56. The cosmological theory of the Big Rip posits that as the universe continues to expand at a faster and faster rate, the force will pull galaxies further from each other, then galaxies will be pulled apart, followed by the planets and objects from their stars, the stars themselves, planets, and so forth until even nuclei in atoms are separated. What a way to go!

57. In 1915, Dr. D.K. Briggs of Blackville, South Carolina, declared 30-year-old Essie Dunbar dead after an apparent epilepsy attack. She was buried the following morning, but her sister in the neighboring town couldn’t get there until after the coffin had been lowered into the ground. When she arrived, she asked the ministers to dig up the coffin so she could see her sister one last time. When the screws were removed and the coffin opened, Essie sat up and smiled at her sister. She went on to live another 47 years, although many people believed her to be a zombie.

58. 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.

59. The Devil’s Bible is real. It’s a contract between a monk and Satan. The monk wanted to escape death so he made a deal with the devil.

60. The Catacombs of Paris hold the remains of more than six million people. Its walls are also made of bones.

61. In ancient Rome, people used to believe that drinking the blood of dead gladiators would give you their strength. The ancient Romans also thought drinking blood would cure epilepsy.

62. Arrhythmic death syndrome is when someone who appears to be in a healthy condition, dies for no visible or discernable reason.

63. Every 18 minutes, someone has a brain aneurysm that ruptures.

64. The FBI once estimated that there are about 25 to 50 active serial killers in America at any given time.

65. In 2007, a woman died after drinking more than a gallon of water in three hours. She did it to win a Wii.

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66. Up until the end of the 1980s, some doctors didn’t believe newborns could feel pain.

67. The chance someone will die on their birthday is 6.7 percent, which is higher than any other day.

This article was originally published on


What are some scary facts about sleep? ›

Physically, sleep deprivation increases risk of stroke, cancer, diabetes and osteoporosis, and affects heart health, can increase future risk of Alzheimer's, and can cause excess weight gain. Some studies have even shown actual genetic changes after even one-week. Enough to scare you straight to sleep!

Did you know facts disturbing? ›

Check out these insane facts that'll have you clutching your head and rocking back and forth while sitting in the shower.
  • The average person walks past 36 murderers in their lifetime. Buzzfeed.
  • Some tumours can grow teeth and hair. ...
  • During World War 2, Japan bombed China with fleas infected with the bubonic plague.
18 Sept 2020

What are some scary things? ›

Top Scariest Things in the World
  • The Triple Galaxy Collision. The universe never fails to surprise us human beings. ...
  • Gympie. The Gympie is an Australian plant having a sting so strong that it may last for months. ...
  • Bolton Strid. ...
  • Brain-Eating Amoeba. ...
  • Jellyfish. ...
  • Heights. ...
  • The Church of Bones. ...
  • Codex Gigas.

What are creepy facts about humans? ›

35 Creepy Facts About Your Body You Probably Never Knew
  • A quarter of your bones are in your feet. ...
  • Mites might live in your eyelashes. ...
  • Women's hearts beat faster than men's. ...
  • You make up to 30 gallons of tears per year. ...
  • Fingerprints form around 23 weeks in the womb. ...
  • Your tongue print is individual.
25 Jul 2018

What is a weird body fact? ›

You are about 1cm taller in the morning when you first get up than when you go to bed. This is because during the day the soft cartilage between your bones gets squashed and compressed. 8. If you walked for 12 hours a day, it would take the average person 690 days to walk around the world.

What is the scariest event in history? ›

13 terrifying historical facts which will keep you awake at night
  • 1.RAINBOW VALLEY. There is an accidental graveyard called the 'Rainbow Valley' on Mt. ...
  • 2.LITTLE ALBERT. ...
  • 4.BABY FARMER. ...
  • 5.JAW DROPPER. ...
  • 6.LIVE FOREVER. ...
15 Feb 2018

What is the longest someone has fallen asleep? ›

There isn't an official world record for the longest time asleep because it's hard to differentiate between those who sleep longer due to comas or medical conditions. However, in 2017, seven-year-old Wyatt Shaw fell asleep for 11 days! After running tests, doctors could not determine what was causing his prolonged nap.

What actually puts you to sleep? ›

The pineal gland, located within the brain's two hemispheres, receives signals from the SCN and increases production of the hormone melatonin, which helps put you to sleep once the lights go down.

What are 5 weird facts? ›

49 Weird & Wonderful Facts Too Odd To Be True!
  • Water makes different sounds depending on its temperature! ...
  • McDonald's invented a sweet-tasting type of broccoli! ...
  • Rabbits can't be sick! ...
  • Humans are the only animals that blush! ...
  • The hashtag symbol has a fancy term! ...
  • Apple pie isn't American!
11 Jul 2022

What are mind blowing facts? ›

100 Mind-Blowing Facts You've Never Heard Before
  • Every 'c' in Pacific Ocean is pronounced differently. ...
  • Black apples exist. ...
  • Butt-shaped robots are used to test phones. ...
  • There are now giant pigs as heavy as polar bears. ...
  • Japanese golfers have hole-in-one insurance.

What are 10 amazing facts? ›

Top 10 Amazing Facts of The World
  • Fastest Gust Of Wind. ...
  • Best Place For Rainbows. ...
  • Flowers Are Changing Colours. ...
  • Mapping Ocean Floor By The Song Of Whales. ...
  • Plants That Fossilised In Green Land. ...
  • New Creatures In Deep Sea. ...
  • Mount Everest is Getting Bigger. ...
  • The Oldest Profession in The World.

What is a scary name? ›

Scary boy names
  • Bram. ...
  • Cain. ...
  • Damien. ...
  • Draco. ...
  • Freddy. ...
  • Silas. ...
  • Bellatrix. ...
  • Carmilla.
31 Aug 2022

What is the scariest thing alive? ›

Scary Animals: The 10 Creepiest Animals in the World.
RankAnimal Name
2Coconut Crab
3Goliath Bird-Eating Tarantula
4Aye Aye
6 more rows
2 Nov 2022

What are the top 10 scariest things? ›

Top 10 Scariest Things Ever
  1. 1 Being Buried Alive. Now even people without a fear of close spaces would be scared as hell to find themselves buried alive in a coffin. ...
  2. 2 Fear. ...
  3. 3 Hell. ...
  4. 4 Being Stranded in the Open Ocean. ...
  5. 5 The Unknown. ...
  6. 6 Burning Alive. ...
  7. 7 Being Lost In Space. ...
  8. 8 Death.

What is the most weird fact ever? ›

Honeybees flap their wings 230 times every second. At birth, a panda cub is smaller than a mouse and weighs only four ounces. Horses and cows can sleep standing up, but they can only dream when lying down. Koala fingerprints are almost indistinguishable from humans' — so much so, they can taint crime scenes!

Does your stomach blush? ›

You blush on the inside: When you blush, it's because blood rushes to the skin of your face. Interestingly, it also rushes to the lining of your stomach. That means when you blush, so does your tummy.

What is the fastest muscle? ›

The eye: the fastest muscle in the human body.

What's the scariest day of the year? ›

Halloween - The Scariest Day of the Year.

What is the creepiest monster ever? ›

The Scariest Movie Monsters, Ranked
  • 7/7 The Bear - Annihilation.
  • 6/7 Death Angels - A Quiet Place.
  • 5/7 The Entity - It Follows.
  • 4/7 The Babadook - The Babadook.
  • 3/7 The Alien - The Thing.
  • 2/7 Xenomorph - Alien.
  • 1/7 Pennywise - It.
14 Sept 2022

What was the weirdest day in history? ›

The imagery that popped into your head is what occurred on the 14th of April in 1561 at Nuremberg, a small German city. The incident is popularly known as the “1561 Celestial Phenomenon Over Nuremberg” or “UFO Battle Over Nuremberg”. It is also one of the strangest days in human history and this is why.

What is the longest someone has gone without food? ›

Angus Barbieri (1939 – 7 September 1990) was a Scottish man who fasted for 382 days, from June 1965 to July 1966. He lived on tea, coffee, soda water, and vitamins while living at home in Tayport, Scotland, and frequently visiting Maryfield Hospital for medical evaluation.

How long does a dream last in real time? ›

The length of a dream can vary; they may last for a few seconds, or approximately 20–30 minutes. People are more likely to remember the dream if they are awakened during the REM phase.

What happens if you don't sleep for a month? ›

It isn't clear how long humans can truly survive without sleep. But it is clear that extreme symptoms can begin in as little as 36 hours. This includes a reduced ability to think, poor decision-making, and speech impairment. Pulling an all-nighter once every couple of months likely won't do any long-term damage.

What is the 4 7 8 sleep trick? ›

Close your mouth and quietly inhale through your nose to a mental count of four. Hold your breath for a count of seven. Exhale through your mouth, making a whoosh sound for a count of eight. Repeat the process three more times for a total of four breath cycles.

Do we grow when we sleep? ›

While you're sleeping, your pituitary gland releases growth hormone, which helps your body to grow and repair itself.

What are 50 fun facts? ›

50 Absurd Facts That Will Make You Question Everything
  • You typically only breathe out of one nostril at a time. ...
  • "Vegetables" don't really exist. ...
  • More people drown in fresh water than in salt water. ...
  • Your brain uses up around 20 percent of your body's blood and oxygen. ...
  • Ravens' moods are affected by others.

What are some weird psychological facts? ›

5 fun psychology facts we bet you didn't know
  • Dopamine makes you addicted to seeking information. ...
  • Being in love is biochemically the same as having a severe obsessive-compulsive disorder. ...
  • In a few hours, you can be convinced you committed a crime that never took place.
7 Feb 2020

What are easy fun facts? ›

Random Facts for Kids
  • Your nose gets warmer when you lie.
  • Before there was Beats by Dre, there was something else altogether. ...
  • It's impossible to sneeze with your eyes open.
  • The most expensive book ever purchased was sold for $30.8 million. ...
  • Speaking of books, there are lots of them to get through.

What is a badass first name? ›

Along with Ace and Axel, other badass boy names in the US Top 1000 include Blaze, Dash, Fox, Harley, Jagger, Justice, Ryker, and Wilder. Many badass names are also impressive occupations, among them Hunter, Pilot, Ranger, and Sargent.

What is a badass female name? ›

Along with Nova, other badass girl names in the US Top 1000 include Elsa, Harley, Jolene, Milan, and Ramona. Unique badass girl names such as Billie, Hollis, and Jupiter are on the rise.

What is the weirdest child's name? ›

50 Weirdest Baby Names Ever!
  • SEVEN.
  • SURI.

What is the scariest human? ›

1 Jeffrey Dahmer Jeffrey Lionel Dahmer (May 21, 1960 – November 28, 1994), also known as the Milwaukee Cannibal or the Milwaukee Monster, was an American serial killer and sex offender who committed the murder and dismemberment of 17 men and boys between 1978 and 1991.

What animal has the scariest face? ›

Fortunately their venom is not deadly.
  • The Black Dragonfish. Dragonfish (Idiacanthus antrostomus) with light-producing organ beneath mouth called barbel. ...
  • White-Shouldered Bat. ...
  • Fangtooth Fish. ...
  • Tapeworm. ...
  • Anglerfish. ...
  • Goliath Bird-Eater Spider. ...
  • Viperfish. ...
  • Giant Deep-Sea Isopod.
25 Feb 2019

What is the scariest animal to humans? ›

Mosquitos are by far the deadliest creature in the world when it comes to annual human deaths, causing around one million deaths per year, compared to 100,000 deaths from snakes and 250 from lions.

What is a sleep monster? ›

The Sleep Monster (Raksasa Tidur) is a character in BoBoiBoy. He is the all-time arch nemesis of Papa Zola.

Why is it scary to sleep in the dark? ›

Studies focused on this phobia have shown that humans often fear the dark for its lack of any visual stimuli. In other words, people may fear night and darkness because they cannot see what's around them.

What is a fact about sleep? ›

Adults between 18 and 64 need seven to nine hours of sleep per night. Adults over 65 need 7-8 hours. Almost half of all Americans8 say they feel sleepy during the day between three and seven days per week. 35.2% of all adults in the U.S.7report sleeping on average for less than seven hours per night.

Who sleeps for the shortest time? ›

The researchers outfitted the elephants with an actiwatch implanted in the trunk to track sleep accurately, and a collar with a gyroscope to track sleeping position. The researchers found that the elephants slept an average of two hours a day, which is the shortest known sleep time of any land mammal.

How long has a human slept? ›

In October of 2017, Wyatt Shaw from Kentucky fell asleep for 11 days. He was just seven years old and doctors ran several tests with no conclusive explanations.

How long did humans use to sleep? ›

Typically, they went to sleep three hours and 20 minutes after sunset and woke before sunrise. And they slept through the night.

Can Talking in Your sleep reveal secrets? ›

Worry not. While it's a great plot device for a TV drama, revealing secrets while sleep talking is probably unlikely to occur. According to a study, it's not the best method to get someone to reveal their secrets!

Is sleep paralysis scary? ›

Sleep paralysis is when you cannot move or speak as you are waking up or falling asleep. It can be scary but it's harmless and most people will only get it once or twice in their life.

Can u hear voices during sleep paralysis? ›

During a sleep paralysis episode, you're aware of your surroundings but cannot move or speak. But you can still move your eyes and breathe. Many people hear or see things that aren't there (hallucinations), making episodes even more frightening.

What is the fear of death called? ›

Thanatophobia is an intense fear of death or the dying process. While it's natural to feel anxious about death from time to time, thanatophobia is an anxiety disorder that can disrupt every aspect of your life. Don't be afraid to talk to a healthcare provider about your fears.

What are the most scariest phobias? ›

Phobias: The ten most common fears people hold
  • Acrophobia: fear of heights. ...
  • Pteromerhanophobia: fear of flying. ...
  • Claustrophobia: fear of enclosed spaces. ...
  • Entomophobia: fear of insects. ...
  • Ophidiophobia: fear of snakes. ...
  • Cynophobia: fear of dogs. ...
  • Astraphobia: fear of storms. ...
  • Trypanophobia: fear of needles.
1 May 2015

At what age should a child stop being afraid of the dark? ›

Most kids will actually outgrow fear of the dark by ages 4 to 5, helped along with some specific strategies. But about 20% of kids will have a persistent fear of the dark. “It's not always so easy to unlearn those startled, anxious, fearful responses,” said Mabe.

What is a useless fact? ›

In 10 minutes, a hurricane releases more energy than all the world's nuclear weapons combined. On average, 100 people choke to death on ballpoint pens every year. (This never happened back when we used feather quills on parchment.) On average, people fear spiders more than they do death.

What's a cool random fact? ›

Cool Weird Facts About Humans

Some tumors can grow hair, teeth, bones, even fingernails. Your brain uses 10 watts of energy to think and does not feel pain. Your fingernails grow faster when you are cold. A typical cough is 60 mph while a sneeze is often faster than 100 mph.

Do humans need to sleep? ›

Sleep keeps us healthy and functioning well. It lets your body and brain repair, restore, and reenergize. If you don't get enough sleep, you might experience side effects like poor memory and focus, weakened immunity, and mood changes. Most adults need 7 to 9 hours of sleep each night.


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