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

MagicalUnicorn
Community Member
6 months ago

i have this, can be a bit annoying

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#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

Kirsten Kerkhof
Community Member
6 months ago

Admit it: you tried it!

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#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

Chucky Cheezburger
Community Member
6 months ago

Aight dangit, now I wanna know what colors I'm missing out on...Or am I not missing any at all....hmmmmm.

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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.

#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

Hayley Rodgers
Community Member
6 months ago

My maternal grandma and grandpa were redheads, my mom and sister are redheads, my husband's dad had read hair, my son is a red head. Out of 23 niblings in both families, my son is the only redhead

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#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

Lucky Kariusmaki
Community Member
6 months ago

That's cool.

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#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

Jiska Veldhuizen
Community Member
6 months ago

Yep that's me.. haha

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“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!”

#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

Navin Kumar
Community Member
6 months ago

that looks so damn good

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#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

mia rose waddington
Community Member
6 months ago

wow that is soooo cool

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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

Badulesia
Community Member
6 months ago

The Rock says : "I can do this !"

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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.”

“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

mia rose waddington
Community Member
6 months ago

thats me

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#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

Kirsten Kerkhof
Community Member
6 months ago

Well, if you can't whistle it's because you didn't eat the crusts of your bread. Or so my mother claimed.

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#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

mia rose waddington
Community Member
6 months ago

wow

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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

Yettichild
Community Member
6 months ago

I'm so jealous.

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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

Kirsten Kerkhof
Community Member
6 months ago

35%?? Everyone I know has or had wisdom teeth. Does this occur in certain populations?

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#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

lunar eclipse
Community Member
6 months ago

Wat

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#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

Sleazy Weaver
Community Member
6 months ago

I have this! It's incredibly painful & feels like the worst kind of pins & needles imaginable.

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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

TheLazyPoki
Community Member
6 months ago

I have that :o

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#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

Mer☕️🧭☕️
Community Member
6 months ago

I wanna know more about this "Golden blood" - sounds interesting!

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#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

Candace Fitzpatrick
Community Member
6 months ago

I can do this too, but I thought this was something everyone experiences

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#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

James016
Community Member
6 months ago

Mr Glass wants to meet you.

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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

Francis
Community Member
6 months ago

me when i'm yawning :D it is so weird xD

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#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

lunar eclipse
Community Member
6 months ago

Two of my maid’s children have this. Brown and white hair. I love their hair.

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#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

René Kok
Community Member
6 months ago

100% of people reading this are looking at their fingers.

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#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

ladi da
Community Member
6 months ago

Does anyone else see the screaming face on a cross?

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#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

Friday
Community Member
6 months ago

I have two dimples and so does my mum. I hated them as a child, but now I think they are cute

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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

Rose the Cook
Community Member
6 months ago

Some people believe this is an indication that you will become rich. I have yet to see anyone who has.

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#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

Kirsten Kerkhof
Community Member
6 months ago

I think it depends on what you classify as blonde. Is it truly white hair or just lighter (like dark blonde)?

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#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

Katie Lutesinger
Community Member
6 months ago

I used to have a big oval birthmark, on my lower back. But it faded as I got older and eventually disappeared altogether.

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#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

Friday
Community Member
6 months ago (edited)

I’ve always gone left! I don’t know why apart from it just feels more comfortable for me

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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

Mer☕️🧭☕️
Community Member
6 months ago

I have a partial second row of top lashes and IT. IS. ANNOYING.

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#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

Sleazy Weaver
Community Member
6 months ago

Why does it need correcting? Isn't it just a cosmetic difference? Shouldn't it be up to the child to keep it or change it once they're old enough to make the decision, as long as it isn't impacting their hearing?

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#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

Doggo Gal
Community Member
6 months ago

My dad has 20\16. It means what the average person could see at 16 ft, my dad could see the same at 20. My brother has 20\150.

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#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

Demi Zwaan
Community Member
6 months ago

Need or want? My teeth aren't perfect and if I was an actor or something, I would've 'needed' braces, but health-wise I don't. So do they mean 75% will have health problems if they don't get work done, or just that it looks ugly?

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#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

Friday
Community Member
6 months ago

I have this and maybe the chimp feet too lol 🙃

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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

TheLazyPoki
Community Member
6 months ago

Im able to :))

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#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

Char Char
Community Member
6 months ago

My face hurts from all this exercise!

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#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

Lauren W.
Community Member
6 months ago

I wish they'd stop calling it double jointed. There are no double joints. Like it says, it's just a variation in connective tissue and joint flexibility.

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#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

Bardhi's Dad
Community Member
6 months ago

But... what's the diference between those two photos?

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#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

MustardLemon
Community Member
6 months ago

yup i just have to imgine biting into a popsicle. lol i liteally got goosebumps writing this.

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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

Sleazy Weaver
Community Member
6 months ago

Add googly eyes!

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#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

ADHORTATOR
Community Member
6 months ago

That's me!

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#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

Chucky Cheezburger
Community Member
6 months ago

Hmmmm...I wonder...:: unsuccessfully trying to lick my elbow...Wife walks in and witnesses me trying::: Wife- What the ever lovin h3ll are you doing? Me as embarrassment and awkwardness set in:: Ummm... nothing hon...nothin at all...

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#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

Nicky
Community Member
6 months ago

I just googled this and snopes declared this was false. Yeah!!!

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#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

Giulia
Community Member
6 months ago

i can sleep if outside there are loud construction sounds but god forbid i hear even the smallest snore ever: i can't sleep and i become instantly annoyed ;_;

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#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

lunar eclipse
Community Member
6 months ago

Do they have time reversal powers?

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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

Demi Zwaan
Community Member
6 months ago

I had a hard time understanding this, because that picture is not showing the mentioned bend at all. This is what it looks like: https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcRv7izzuQZ8x4BdXJ5PzLGWd-Ogt4KLZ4xgMQ&usqp=CAU

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#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

mcborge1
Community Member
6 months ago

Mine used to be an outie, lol.

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#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

Nicky
Community Member
6 months ago

When I fell skating, an x-ray revealed that I had an extra bone in my forearm. The doctor took med students to see me and my unexpected x-ray!

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#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

lunar eclipse
Community Member
6 months ago

Heh. Mine almost does

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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

Sasy
Community Member
6 months ago

Bowie

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Note: this post originally had 60 images. It’s been shortened to the top 50 images based on user votes.