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Humans have been puzzled by things like the depths of the ocean and outer space. But one equally mysterious object has been standing right in front of you when you look in the mirror. It’s a human body.

And one TikTok creator named Knowledgesaurus has been stripping away the mystery surrounding it in a series of “How Rare Is Your Body?” videos. From explaining what percentage of people have features like cracked tongue, angled palm crease, or an extra rib, to counting how many people have the ability to write with both their right and left hands, or can make a clover out of their tongue.

The informative and fun videos gained Knowledgesaurus immediate popularity with millions of views and 1.3M followers, so let’s see some of the most interesting body facts that will pump your biology knowledge muscle so you can show it off in the next trivia session.

@knowledgesaurus

How Rare Are You? ##rare ##howrare ##bodyfacts ##mindblown ##fyp ##foryoupage ##greenscreen

♬ original sound - Knowledgesaurus

#1

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series 25% of people sneeze when they're exposed to direct sunlight. It's called the photic sneeze reflex.

knowledgesaurus , Mikael Blomkvist Report

#2

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series 30% of people can flare their nostrils on command. However that muscle has very little use and is usually weak, so a lot of people can't do it on command.

knowledgesaurus , Pat David Report

#3

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series Only 12% of people have tetrachromacy - the ability to see a lot more colors than the majority of people. They can see about 10 times as many shades and colors as someone with normal vision.

knowledgesaurus , lionstalkscience Report

With 1.4 million followers and 38.5 million likes on TikTok, Knowledgesaurus is the internet’s beloved creator sharing everything interesting—facts, smart observations, and common myths—in lighthearted and fun videos. Bored Panda reached out to Knowledgesaurus to find out more about his personality and how his love for fun facts and dinosaurs won the hearts of the internet.

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#4

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series 2% of people naturally have red hair. In order to have a child with this hair color, both parents need to possess the gene, and while redheads make up a tiny part of the population, one study found that 30% of ads have people with red hair in them.

knowledgesaurus , Monstera Report

#5

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series Less than 1% of people can hear colors or see sounds (synesthesia).

knowledgesaurus , TEDxPeachtree Team Report

#6

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series 9% of people can taste the soap taste in cilantro. Cilantro contains the chemical that is also a byproduct of soapmaking.

knowledgesaurus , Michael Lehet Report

“I’m 25 years old and have been an entrepreneur since the age of 19. I found success with that early on and ended up dropping out of college. I made good money, but wasn’t happy.” At that point, the TikTok creator took a risk and decided to “stop all that and start something more fun that I’m interested in and that’s how Knowledgesaurus started. I started this account 1/1/2021 with the goal of growing it and making it my full-time job and within 110 days, I was able to reach 1 million followers, which I’m so thankful for!”

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#7

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series 5% of people have amber eyes - golden or coppery with flakes of gold, green or brown. Amber eyes are very common in dogs, bird and fish.

knowledgesaurus , Eric May Report

#8

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series Less than 1% of people have this small little hole right on their ear. Some evolutionary biologists claim this used to be a gill on humans.

knowledgesaurus , AdamMichaels784 Report

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#9

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series 24% of people can raise one eyebrow, however you can learn to do this as well.

knowledgesaurus , Lee Haywood Report

When asked how he came up with the idea for the "How Rare Are You?" series, Knowledgesaurus said it started after making a bunch of videos and seeing what people enjoyed watching. “I realized that people love to know information about themselves and love statistics. So that’s how the series began.”

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“I always loved knowing random useless information to surprise people with,” the content creator said and added: “I think it all started when I was younger. If someone was talking about something I didn’t know much about, I would go and look up stuff about it and find interesting information about that topic so I could have a better conversation next time.”

#10

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series 10% of people have something called Morton's toe. It's when your big toe is shorter than the one next to it. The Statue of Liberty actually has a Morton's toe as well.

knowledgesaurus , Jonnystahl Report

#11

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series Only 33% of people can whistle. Almost everyone has the ability to whistle, it just takes the right techniques.

knowledgesaurus , Sora Shimazaki Report

#12

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series Only 1% of people are ambidextrous - they have no preference for the use of right or left hand.

knowledgesaurus , alamelu24 Report

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#13

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series 1% of people need less sleep than the rest of us. These people have Sleeper Syndrome which allows them to go through a sleep cycle faster than an average person.

knowledgesaurus , Andrea Piacquadio Andrea Piacquadio Report

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WilvanderHeijden
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Don't be. There's no fun in getting berated because you're sending e-mails at 5.45 AM because you're done sleeping and already working.

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Marta Kęska
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

That's me! I sleep on average 5 hours a day and that's enough. If I sleep more than 8 accidentally (usually on weekends) I wake up exhausted and sluggish

Axolotl King
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Oh wait that might be me too. On nights when I get like 4 hours of sleep I wake up fine and can go about my day normally, however when I get a normal amount like 7-9 hours it takes me a long time to get up and I'm tired for like half the day

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Monty Is Fiennes
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Yup...I know someone who always seems energetic even when I know they are under stress.... they only need three hours sleep... and get up to do housework bout 3am...

Night Owl
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

I have trouble sleeping, way more energy and much less ability to concentrate when under stress

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Mz Phit
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

I have the opposite... I need a ridiculous amount of sleep to feel normal. I hate it

Ileana Sky Aviles
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

This is me! I only need 4 hours or 5 then I'm perfect! My dad can power nap in 10mins and he's up and full of life!

Dar843
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

This! Me too!! But it has to be a full 4 or 5 hours and I'm dead to the world. I wake up refreshed, sunshine and rainbows, no coffee required. I've always just thought I was too paranoid and hated sleeping. However, If i sleep 7+ hours I will wake up tired, exhausted, and my brain is foggy.

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Sourosree Pathak
Community Member
2 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

That's me, I sleep no more than 4 hours a day, and if I sleep more than that I feel extremely tired and sluggish

Perry
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

This is me but I also have insomnia so it balances out

HooowlAtTheMoon
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

I have this! I only need 3 or 4 hours of sleep a night to be totally energized! It sucks sometimes though because I wake up at 2 am and can't get back to sleep, because I'm all refreshed and awake and when I do get back to sleep i wake up with a neck ache or a headache and everything hurts

Dave P
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

There was a famous philosopher in the late 1800's to early 1900's, slept only 1 and a half hours a night, and was always fully alert and rested during the day.

That_WeirdBunBun!
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

I think I may have this! It might be from years of insomnia, but I usually don’t need much sleep

H Edwards
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Maybe this is how Maggie Thatcher managed on 4 hours a night, allegedly.

Fin Weirdo
Community Member
6 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Me. 3 hours, yay wake up not tired at all. 9-7 hours, tired af

SOPHIA SANTIAGO
Community Member
2 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Don't be one time I woke up at 4:00am and I went to sleep at 11:00pm the worse thing was I was alone at home.

Lynn Morello
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

That depends on the hormone levels with me. I can either thrive on 6 hours sleep or can't get enough sleep.

Donkey boi
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

I'm in whatever percentage is for the ones that never feel like they've had enough sleep and always feel like they are dreaming.

CRAZY BABY DOGE!!!!!
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

i have this. its really cool. i usualy wake up at 12:00 or somtimes 1:00

Arctic Fox Lover
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

I think that might be me. I can sleep for a very short time, wake up, and feel completely energized for the rest of the day. Idk tho

Mary Rose Kent
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

My best sleep is six hours; I can handle five or seven, but anything less or more leaves me feeling cattywumpus all day.

somnomania
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

must be nice. is there a reverse version of this, besides non-24?

Keith Wollenberg
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Probably the most adaptive trait possible to the modern industrial world. If regular selective pressures applied, the relevant genes would propagate and increase in frequency through the populations of first world countries.

InfectedVoice
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Used to sleep loads when I was younger, now I sleep 5-6 hours every night and feel fine, plus once I wake up now I can't go back to sleep anymore.

Katelyn
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

I kinda have this but what I can do is I can go on auto pilot with whatever I'm doing and I'm "sleeping" with my eyes open and I do that for like 2 hours and I'm good to go

Amy Cohen
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Also if only 1% has this, the whole comment section can't have it!

Amy Cohen
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Guys for all of you who don't think you need sleep, make sure it's not mania. I'm bipolar and if I don't sleep for 2 days or only need like 2 hours, I'm manic. Side note: I do well on 6 hours and 16 hours. There's no in between.

Chloe *Leah* Pheonix
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Can this be caused by lack of sleep because I got like 2 hours of sleep and I feel JUST FINE

Janus Sanders
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

i maybe have this? i'm not sure but i do know that i can sometimes stay up really late and not have many consequences the next morning energy wise. i wonder if i have it or not!

Phica Afton
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

I think I have this? I pulled an all nighter once, took a four hour nap and was fine the rest of the day.

IlovemydogShilo
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

I have been surviving on 2 hours of sleep for most of my adult life.

Foxxy (The Original)
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Is there any risks associated with this at all? And do they actually wake up feeling well rested?

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#14

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series 35% of people have no wisdom teeth. Wisdom teeth used to serve a purpose but now they no longer do, which is why we take them out so they don't get infected while they're pushing through your gums. If you don't have wisdom teeth, I'm jealous of you.

knowledgesaurus , Anna Shvets Report

#15

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series 83.7% of people can roll their tongue, but only 14.7% of people can make a clover out of their tongue.

knowledgesaurus , TheEnigmaticHaze Report

#16

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series 4% of people have Raynaud's syndrome. This is when a part of your body, usually your fingers or toes, starts to turn white when exposed to low temperatures. It's your body's overreaction to cold or distress.

knowledgesaurus Report

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#17

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series Only 10% of people have Darwin's tubercle - the little bump on the outside of your ear. It's believed that people who have this are better at sensing voice tonality.

knowledgesaurus , Dbenbenn Report

#18

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series Less than 1% of people in the US have AB-Negative blood. There's also something called Golden blood, which only about 40 people in the world have, and it's completely different than any other blood.

knowledgesaurus , Vegasjon Report

#19

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series 16% of people can make a roaring noise in their head using their jaw. They're able to do this because they can control a small muscle in their jaw that deafens chewing, but when it is flexed it makes a roaring noise.

knowledgesaurus , Ono Kosuki Report

#20

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series Less than 1% of people have unbreakable bones. This is caused by a mutation in one of the genes that causes the bones to be up to 8 times denser.

knowledgesaurus , Mikael Häggström Report

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#21

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series 35% of people can gleek. Only 1% of people can do it on command. Gleeking is when you're spitting saliva from under your tongue and it squirts out.

knowledgesaurus , g0lb0 Report

#22

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series Less than 1% of people are born with a white patch of hair. It is called poliosis, which is caused by the lack of pigment called melanin in the hair follicles.

knowledgesaurus , Klaus D. Peter Report

#23

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series Only 5% of people have arched fingerprints. Most people have looped and whorled fingerprints.

knowledgesaurus , Noonifer Report

#24

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series Less than 1% of people have their heart on the right side of their body. Surprisingly, this doesn't normally come with any negative consequences.

knowledgesaurus , millenniumxl-20 Report

#25

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series Only 25% of people have dimples. You can have either two, or just one. Dimples are also hereditary, so if either of your parents has a dimple, it's more likely you'll have one as well.

knowledgesaurus , Jacob Mejicanos Report

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#26

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series 20% of people have a gap between their two front teeth. What normally causes this is a discrepancy between the jaw size and the teeth. A lot of celebrities have this and don't correct it because they think it makes them unique.

knowledgesaurus , Paulblank Report

#27

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series Only 2% of people naturally have blonde hair. If you narrow it down just to white people in the United States, that percentage goes up to 5%.

knowledgesaurus , Chris Blonk Report

#28

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series Only 10% of people have birthmarks. They're usually oval in shape and come in a coffee type color.

knowledgesaurus , Ben Crowe Report

#29

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series 70% of people bend their head to the right when kissing. Your brain is the cause for this. The left side of our face shows more emotion so we want to give our partner the more emotive side and we tilt our head to the right.

knowledgesaurus , henri meilhac Report

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#30

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series 1% of people have a double row of eyelashes. While this might look like something a lot of you are jealous of, it actually can cause a lot of problems.

knowledgesaurus , lipstickplant Report

#31

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series Less than 1% of people have pointy or elf-like ears. It's an abnormality called Stahl's ear, it's usually corrected early in life.

knowledgesaurus , christinev8 Report

#32

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series Only 35% of people have 20/20 vision. 2/3 people cannot see perfectly.

knowledgesaurus , Karolina Grabowska Report

#33

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series 25% of people have perfect teeth and never need braces or any orthodontics. 45% of children need braces, but 75% need orthodontic care.

knowledgesaurus Report

#34

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series 14% of people don't have this muscle - Palmaris Longus. This muscle was developed when our ancestors were big tree climbers. If you want to see if you still have it, pull back your palm on a flat surface, touch your pinky and thumb together and slightly lift them and you should see that ligament pop out.

knowledgesaurus , Couch-scratching-cats Report

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#35

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series 6% of people can vibrate and rapidly shake their eyeballs back and forth.

knowledgesaurus , ROTFLOLEB Report

#36

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series 10% of people can touch their nose with their tongues. In medicine, this is called the Gorlin sign.

knowledgesaurus , cheshielynx Report

#37

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series 20% of people are double jointed. This is thought to be genetic and due to a variation in collagen in your connective tissues.

knowledgesaurus , Rocky Mountain Goat Report

#38

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series 4% of people are colorblind. Color blindness occurs in 8% of men and 0.5% of women.

knowledgesaurus , Simon Strandgaard Report

#39

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series Less than 1% of people can give themselves goosebumps on command. The majority of people get them when they're cold or listening to music, but some can give themselves goosebumps whenever they want to.

knowledgesaurus , Ildar Sagdejev Report

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#40

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series 5% of people have a double hair whorl.

knowledgesaurus , HorsePunchKid Report

#41

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series Only 12% of people dream in black and white.

knowledgesaurus , Andrea Piacquadio Report

#42

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series Only 1% of the population can lick their elbow. The people that can do this usually have either a long tongue or a short forearm, or both.

knowledgesaurus , meikomac Report

#43

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series 10% of people are left handed. Left handed people tend to live shorter lives.

knowledgesaurus , ThisIsEngineering Report

#44

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series 25% of the population snores regularly.

knowledgesaurus , Kampus Production Report

#45

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series 8.4% of people have a counterclockwise hair whorl on their head, while the majority has a clockwise one.

knowledgesaurus , Noj Han Report

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#46

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series 8% of people still have chimp-like feet, that are specifically adapted to climbing trees. This is characterized by a mid-foot arch. If you want to check if you have this, see if you can bend the ball of your foot as well as the region half-way between your heel and the ball of your foot.

knowledgesaurus , Anna Shvets Report

#47

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series Only 4% of people have an outie belly button. Believe it or not, doctors can't choose if you'll have an innie or an outie belly button, things like the belly button itself and the fat beneath it determine what it will look like.

knowledgesaurus , Kytrez Report

#48

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series Less than 1% of people have an extra rib. Most people are born with 24, but some have 25 ribs. The 25th is called a cervical rib.

knowledgesaurus , pxhere Report

#49

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series 25% of people have a Hitchhiker's thumb - when the upper part of the thumb can bend 90 degrees backwards. It's caused by a certain gene.

knowledgesaurus , Sudo_Nymn Report

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#50

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series About 20% of people have a pupil that is bigger than the other. This is called anisocoria, it can be a very small, or a very big difference.

knowledgesaurus , Tair1978 Report

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#51

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series 22% of people can wiggle one ear, and only 18% can wiggle both. The ability to do so may be inherited, however, it can also be learned with practice.

knowledgesaurus , Karolina Grabowska Report

#52

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series Less than 1% of people have perfect pitch - the ability to identify the exact note when you hear it. A lot of people believe you're born like this however some researchers have hypothesized that you can learn this later in life as well.

knowledgesaurus , Charles Parker Report

#53

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series Less than 1% of people have an uncombable hair syndrome. It's characterized by frizzy hair that can't be combed down. It's normally seen in people that are younger and usually have blonde hair.

knowledgesaurus , buldog4354 Report

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#54

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series 10% of adults in the US have never had a cavity in their life, however it's estimated that 1 in 4 adults have cavities that are untreated.

knowledgesaurus , Andrea Piacquadio Report

#55

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series 7% of people can tickle themselves. Usually your brain does not let you tickle yourself, but some experts believe that if you push your tongue up against the roof of your mouth you can actually tickle yourself, because you're not used to that sensation.

knowledgesaurus , cottonbro Report

#56

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series Only 6% of people have a cleft chin - a dimple in the middle of your chin. It is usually genetic, you can actually add or remove one with surgery.

knowledgesaurus , paul stumpr Report

#57

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series Only 1.5% of people have a single palm crease. This is often found in males and is a hereditary trait.

knowledgesaurus , chrishill95 Report

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#58

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series Only 1% of people clasp their hands this way.

knowledgesaurus Report

#59

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series 5% of people have a cracked tongue. It develops in birth or childhood, and is associated with Down syndrome and malnutrition.

knowledgesaurus , Scotty_1 Report

#60

Person Invites You To Learn 'How Rare Is Your Body?' In His Viral Series About half of the population can wiggle their toes individually. The big toe and little toe have individual muscles so it's easier to move them, but the middle toes are all controlled by one set of muscles so those are a lot more difficult to move.

knowledgesaurus , Frank Vessia Report