It’s hard to believe the world was once such a mystery. We’ve gone from knowing nothing about our planet to being able to see it all with a few taps on our phones. But despite all the technological advances, there are still so many unknown things — even today. What we know though, is that the world is a strange place full of scary things, and with each passing day, we learn something new about it. Some of these little tidbits are fascinating, some are funny, while others are just plain creepy stuff.

I’m not sure what you had in mind when you clicked on this article, but you’re probably aware you’re a psycho on a certain level. Just so you know, you’re not alone! There’s something about discovering macabre and disturbing facts that just sticks with us. It’s the reason why we enjoy horror movies, haunted houses, true crime docu-series, and those articles on weird facts about the Human body. Ready to be freaked out? Here are 101 creepy facts you might wish you didn’t know.

#1

Crows can recognize and remember human faces.

#2

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.

#3

There are bodies of over 150 dead hikers on Mount Everest, and they’are used as landmarks.

#4

Ducklings can engage in cannibalistic behaviors when they're bored.

#5

While Ted Bundy was a psychology major at the University of Washington, he worked at Seattle's Suicide Hotline Crisis Center.

#6

Real corpses were used in the 1982 film Poltergeist.

#7

Climate change is making spiders bigger.

#8

Mobile phones are 10 times dirtier than a toilet seat.

#9

Locked-In Syndrome is a condition in which a patient is fully aware but is stuck in a coma-like state.

#10

Spiders can survive in space.

#11

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.

#12

Dogs like squeaky toys because they mimic the screams of their prey.

#13

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.

#14

During the mummification process, Ancient Egyptians remove the brain through one of the nostrils.

#15

Horned Lizards can defend themselves by squirting blood out of their eyes.

#16

Arrhythmic death syndrome is a sudden condition where someone seemingly healthy dies suddenly with no apparent cause of death.

#17

Two Scottish surgeons originally invented the chainsaw to assist childbirth.

#18

The Turritopsis Dohrnii jellyfish is officially known as the only immortal creature in the world. It lives forever.

#19

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.

#20

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.

#21

More than 80% of our ocean is unmapped, unobserved, and unexplored.

#22

Fatal familial insomnia makes it impossible for someone to sleep for months.

#23

250,000 deaths a year are due to medical errors.

#24

King Charles II drank alcohol mixed with pulverized human skulls.

#25

When you die the last sense to leave your body is the ability to hear.

#26

Some ants turn into zombies via parasitic fungus which manipulates their brains.

#27

Some female spiders allow their young to eat them alive.

#28

Humans produce about 1.5 quarts of mucus every day.

#29

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.

#30

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.

#31

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

#32

Criminologists estimate that there's a 1-in-3 chance police will never identify your killer if you're murdered in the US.

#33

Over 20% of children report hearing voices.

#34

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.

#35

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

#36

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

#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.

#38

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

#39

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

#40

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.

#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.

#42

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

#43

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.

#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.

#45

"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.

#46

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

#47

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

#48

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.

#49

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

#50

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

#51

Many crocodile species can gallop, and they are fast.

#52

Your skeleton is always wet.

#53

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

#54

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

#55

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

#56

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

#57

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

#58

Rodents' teeth grow continuously throughout their lives.

#59

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

#60

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

#61

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

#62

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

#63

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

#64

Some species of fish have human-like teeth.

#65

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.

#66

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

#67

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

#68

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

#69

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.

#70

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.

#71

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.”

#72

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

#73

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

#74

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

#75

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

#76

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

#77

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

#78

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.

#79

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

#80

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.

#81

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

#82

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

#83

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

#84

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.

#85

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.

#86

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

#87

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

#88

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.

#89

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

#90

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

#91

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

#92

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

#93

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

#94

“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.

#95

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

#96

Scientists say 'black holes' exist in the ocean.

#97

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.

#98

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

#99

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