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As of January 2021, there were 4.66 billion active internet users worldwide, which makes 59.5% of the global population. Of this total, 92.6% (4.32 billion) accessed the internet via mobile devices, Statista estimates. So just imagine how much information there is online. In fact, it’s probably impossible to wrap your head around it.

Part of the appeal in going online is that you get to share things with others. From what you’ve been up to, to what’s on your mind. Quite literally. Like this recent thread on Reddit, where the user Mistik06 asked everyone “What’s a cool fun fact that you know?” and got people posting the craziest facts they know. 24k upvotes and 10.7k comments later, we have an amazing collection of trivia facts you probably haven't heard of before, so enjoy!

#1

Someone Asked, ‘What’s A Cool Fun Fact That You Know?’, 40 People Delivered Pufferfish contain a toxin in their spikes that kills predators. It has a slightly different effect on dolphins though, in that it gets them high. So teenage dolphins will pass around pufferfish and impale themselves off of them to get stoned.

The_mystery4321 , unsplash Report

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

Someone better let the pufferfish know. They could build a successful drug empire off it. Puff Cartel.

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#2

Someone Asked, ‘What’s A Cool Fun Fact That You Know?’, 40 People Delivered Apparently, studies show that Crows, Ravens and other Corvids are self aware and are able to ponder the content of their own minds.

TonyThePubeShalhoub Report

#3

Someone Asked, ‘What’s A Cool Fun Fact That You Know?’, 40 People Delivered Dragonflies are the predator with the highest success rate (over 90%), and are one of the few animals that are capable of plotting intercept courses rather than chasing their prey. They're basically mosquito murder drones.

00zau , Mindaugas Balčiauskas Report

#4

Someone Asked, ‘What’s A Cool Fun Fact That You Know?’, 40 People Delivered Elephants think humans are cute in the same way we think puppies and kittens are cute.

stranded_egg Report

#5

Someone Asked, ‘What’s A Cool Fun Fact That You Know?’, 40 People Delivered Scientists speculated there are other planets orbiting distant stars, but haven't had a clear evidence of this fact up until the 1990's. And the majority of currently known exoplanets (almost 5000, as of now!) have been discovered well into 2000's, which means that humanity is at the very beginning of its discovery journey regarding other planetary systems.

With James Webb telescope being extremely close to finalizing its calibrations as we speak, we will be able to not only discover hundreds, if not thousands of new planets (and stars and galaxies), but also detect whether there are traces of alien civilizations on them. We should all be very excited about this, as this is unprecedented, and a HUGE deal for science and our species as a whole.

MadHatter69 Report

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DennyS (denzoren)
Community Member
2 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

This is amazing. Sometimes I wonder what it would be like to be born 100 years from now, how advanced would we be.

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#6

Someone Asked, ‘What’s A Cool Fun Fact That You Know?’, 40 People Delivered Ok, this fact has connected facts:

In late 1800s girl killed herself by jumping from bridge on Sienna river and she was known as The Unknown Woman of the Seine.

When the guy who worked in morgue saw her, he thought she was beautiful and ordered a plaster cast of her face.

Fast foward to 1960s, CPR was invented and they needed a doll to train people. So they partnered with Norwegian producer of medical devices. That guy decided to use the plaster cast of Unknown Woman of the Seine and named the doll Anne(Annie) because his doughter was named Anne(Annie).

While performing CPR, people were trained to talk to a doll(person) so there is that common phrase:"Annie! Annie are you ok?"

Fast foward to when Michael Jackson decided to put that phrase in his classic "Smooth Criminal".

SimfonijaVonja , wikipedia Report

#7

Someone Asked, ‘What’s A Cool Fun Fact That You Know?’, 40 People Delivered When Thomas Edison was bound to a wheelchair, Henry Ford bought a wheelchair for himself so that he and Edison could race.

BasherBomber Report

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#9

Someone Asked, ‘What’s A Cool Fun Fact That You Know?’, 40 People Delivered Steven Seagal once told Gene LeBell that he was immune to being choked out from doing so much martial arts training, so Gene choked him out and he sh*t his pants.

runnerboiii Report

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#10

When sea otters find a rock they like to bust open clams, they will tuck it under a fold of skin in their armpit. They also hold each other’s paws while they’re sleeping so they don’t float away from each other. Baby otters aren’t buoyant enough to stay afloat so they will sleep on their mom’s tummies until they’re older.

Soggy_Willingness_65 Report

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

That's pretty cute. And they keep their favourite little rock where I keep my Cheet-Os! What are the chances? Go little Otter dudes!

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#11

The creator of the pop-up ad made a formal apology for his creation.

iiXXDestruction Report

#12

Someone Asked, ‘What’s A Cool Fun Fact That You Know?’, 40 People Delivered Dinosaurs existed for so long that there were still dinosaur fossils from previous eras while other dinosaurs from future eras were alive.

So basically, when T-Rex was still alive and well, Stegosaurs was nothing more than fossilized bones under their feet even back then.

mjohnsimon Report

#13

Someone Asked, ‘What’s A Cool Fun Fact That You Know?’, 40 People Delivered You can fit the entire population of the human race inside the Grand Canyon. Not just the 7 billion alive now - the entire lot. From the very start. And still have plenty of room for those who are yet to be born.

The-Go-Kid , pexels Report

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80 Van
Community Member
2 years ago (edited) DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

If you piled everyone in there, the birth rate might increase a lot faster than currently expected.

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#14

Someone Asked, ‘What’s A Cool Fun Fact That You Know?’, 40 People Delivered If every person on earth fought 1v1 until there was only 1 winner, that person would only have to win 33 times.

_Germa66 , pexels Report

#15

Someone Asked, ‘What’s A Cool Fun Fact That You Know?’, 40 People Delivered The sound of an ATM drawing cash is a manufactured sound. It's just to let you know that the ATM is indeed working and that your money is coming up.

YoreCoxsmall , pexels Report

#16

Someone Asked, ‘What’s A Cool Fun Fact That You Know?’, 40 People Delivered That if sound could be transmitted through space, the sun would be so loud on earth it would be the equivalent of standing next to a jet engine, even though it's 94 million miles away.

insert_name_0 , pexels Report

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

Sound in space travels along gravitational waves and can also be picked up via vibrations. Space agencies have been listening to the sun and planets for years (Jupiter and Saturn sound particularly scary).

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#17

Someone Asked, ‘What’s A Cool Fun Fact That You Know?’, 40 People Delivered Your nose is impacting your vision 100% of the time.

However, since your "picture" you see is just an interpretation by your brain, your brain erases your nose as useless information. You'll only see it, if you really concentrate on it, if you close one eye, or if you put your finger on the very tip of your nose.

It seems like a harmless fact until this thought enters your head...

"Your nose is real. Your brain removes it from your vision as useless, but it is very much there, and very much real. What other things is your brain removing from your vision?"

It's wild to think that your entire life experience is just your brain doing it's best to interpret your senses. And that it's definitely not a "perfect" system. It could be interpreting everything incorrectly, and we collectively wouldn't have any idea.

watch_over_me , unsplash Report

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

Now it will take me all morning to unsee my nose and eyeglasses again, thank you for this...

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#18

Someone Asked, ‘What’s A Cool Fun Fact That You Know?’, 40 People Delivered Moose are really good swimmer's and even swim from island to island to feed on the underwater vegetation

But orcas will occasionally stumble across then and hunt them down and moose haven't evolved far enough for them to know that orcas are predators

supremekingend123 Report

#19

Someone Asked, ‘What’s A Cool Fun Fact That You Know?’, 40 People Delivered Cracking your knuckles WILL NOT lead to arthritis.

1980pzx , pexels Report

#20

"Twelve Plus One" is an anagram of "Eleven Plus Two"

ConsistentlyPeter Report

#21

The difference between Million and Billion is more than we think.

To put it in perspective, 1 million seconds is about 12 days while 1 billion seconds is equivalent to 31.7 years.

Tusharkrux Report

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80 Van
Community Member
2 years ago (edited) DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

And the difference between a billion and a trillion seconds is 31.7 years and 31,700 years.

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#22

Birds are classified as extant dinosaurs, not just descended from them. They are actual living, breathing dinosaurs.

herculesmeowlligan Report

#23

Manatees regulate buoyancy by farting. They eat a ton of plants and accumulate a lot of methane. They then release gas when they want to sink and hold it in when they want to go to the surface or are being polite.

HangingByThirty Report

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#24

Someone Asked, ‘What’s A Cool Fun Fact That You Know?’, 40 People Delivered A single gram of DNA contains about 700 terabytes of information.

Clover-Bug , unsplash Report

#25

Someone Asked, ‘What’s A Cool Fun Fact That You Know?’, 40 People Delivered When they first measured the height of Mt. Everest it was exactly 29.000 feet, but as that sounds like a made-up number they declared it to be 29.002 feet.

buckfutter4life , pexels Report

#26

Someone Asked, ‘What’s A Cool Fun Fact That You Know?’, 40 People Delivered Sharks like and get attracted to Heavy Metal music played underwater.

NittoPoint , pexels Report

#27

Someone Asked, ‘What’s A Cool Fun Fact That You Know?’, 40 People Delivered If you made $10,000 per day, every day since the pyramids were built around 4,500 years ago, you'd have 6% of Elon Musk's wealth.

FridayOakafor Report

#28

You don't use shock paddles on a stopped heart.

Shock paddles simply put a heart back in to a natural rhythm, they will not restart a heart if it has stopped. That's what chest compressions are for.

12thirteen14fifteen Report

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rabbitcarrot avatar
Rabbit Carrot
Community Member
2 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

And you actually have a very high mortality rate if you need chest compressions or a heart shock. The 5 year survival rate for both is very low.

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BorPand8
Community Member
2 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Does that mean that being "brought back to life" by CPR makes you more likely to die within the next 5 years? Or that your chances of being "brought back to life" are very low?

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Roadkill The Brave
Community Member
2 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

When someone is performing CPR they're working on a corpse for all intents and purposes. There is a bunch of stuff that is used to 'Restart' the heart. Defibrillation does work if the heart is still in A-Fib, which means it's jerking like a muscle twitch instead of working like normal. They knock it back into it's normal rhythm. CPR increases chances of survival however it will not bring someone back to life. The entire point of CPR isn't to bring someone back to life - Its to keep blood which carries Oxygen moving through the system. Oxygen is the vital thing in the equation. Without oxygen the chances of survival are cut, so CPR with rescue breaths is vital for the chain of survival. AED, EMS, emergency care, and follow up care are the rest of the links in that chain - without one your chances drop drastically. Even using all of them you're chances of survival are decreased the longer it takes for EMS to get to you. CPR gives you a chance.

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

Defibrillators actually *stop* the heart. That's the whole point. The heart has gone into ventricular fibrillation - it's wobbling like a jelly and not beating effectively enough to pump blood. A shock to the heart (hopefully) stops or interrupts the wobble encouraging normal function to return.

dc1 avatar
DC
Community Member
2 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

... hate that on TV... People even demand shockstarting their relatives and sue people for "not having done all they could", because they see this crap on TV...

amyburke avatar
Amy Burke
Community Member
2 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

wrong .. shock paddles work on a tiny muscle in the heart like a start plug ... CPR is just to keep you alive and keep your 'start plug' going until defibrillation can be administered

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

People thinking you can jump start a heart like a car battery...

bobbruce avatar
bob bruce
Community Member
2 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

That's absolutely not how it works. The paddles are part of a device that's called a defibrillator because it stops fibrillation. That means its *stops* an abnormal rhythm, which means it stops a (poorly) beating heart. If you're lucky the heart will then regain a normal rhythm.

the_rosary avatar
jolie laide
Community Member
2 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

I remember when my Mom went into the hospital. Her heart was still beating, but there was this.. bright red, irritated patch on her chest after the ambulance came and took her, then that hospital stabilized her and transferred her via ambulance to a better one. It was after all of that that I saw it and... my brain couldn't make sense of it at the time. I was numb, in shock, just... I didn't know what I was looking at but it was repeated attempts from medical personal to get a pain response from my Mom. Rubbing their knuckles, HARD, on her breastbone to see if she'd respond. So if anyone sees that on a loved one.. a line of super pink/red/inflamed skin... that's what they were doing.

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

If you have "flatlined" they give you some epinephrine to try to get your heart fibrillating, basically put you into ventricular fibrillation, which is certainly a step up. Once they have you in ventricular fibrillation they have activity to shock back into rhythm.

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

Should check out a chest compression machine in ambulances. Basically a rib destroying piston that no way could you tolerate if conscious, but DOES saves lives.

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

The Zoll resqpump. An awesome addition to the Auto Pulse. Not many places use the "thumper" any more. LLAP

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

In the words of Dr. Mike, "Chest compressions, chest compressions, chest compressions!"

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Scp_049
Community Member
2 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

"CHEST COMPRESSIONS, CHEST COMPRESSIONS, CHEST COMPRESSIONS!" -Dr Mike

richard_6 avatar
Richard Willis
Community Member
1 year ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Chest compressions are not to restart the heart; they are to maintain a degree of circulation to essential organs until other interventions can be tried.

richard_6 avatar
Richard Willis
Community Member
1 year ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Chest compressions are not to restart the heart; they are to maintain circulation to essential organs until other interventions are tried.

cynthias3355 avatar
Cynthia Souza
Community Member
2 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Dr. Mike: chest compressions, chest compressions, chest compressions!!

trcoop368 avatar
Toni Riley Cooper
Community Member
2 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

I beg to differ, cpr does NOT restart a heart, no matter how many Hollywood movies you have seen. It just keeps the blood from pumping. You must have an electrical impulse to restart a heart.

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

If you think of "Heart Problems" as being either a plumbing (blocked pipe) or electrical (dodgy wiring) issue it makes it a lot easier for many people to understand their "heart attack". This is where very expensive specialists work out is your issue plumbing or electrical and also why for some the base cause can only be held at bay (pacemakers, bypass grafts, medications) but not really cured because it would require a total rebuild with new plumbing/wiring and sometimes that is not possible in a human (or a building) because it may never have been done right in the first place. This same plumbing/electrics issue is also why for some even early intervention with CPR and AEDs is not successful no matter how much you try

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Glasia van Duivels
Community Member
2 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

If we tax 10M/mo income 99% then they would still have 100K per month which is more than enough to live.

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

Not true. When doing chest compressions, you're manually pumping the heart so blood flows through the body. The shock from a defibrillator restarts the heart. This was explained to me by my husband's cardiologist after he had a heart attack and went into cardiac arrest. Our son and I took turns doing CPR until the paramedics arrived.

slw303 avatar
SuePrew
Community Member
2 years ago (edited) DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

nope, only a shock will restart a heart. chest compressions are for keeping the blood circulating so the organs won't die.

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

Half right! Chest compressions are to keep the blood flowing around, with oxygen, to cells to keep the tissues viable until help arrives. They should be used *whenever* someone has stopped breathing, don't worry about what their heart is doing. AEDs will work if the heart is fibrillating (tremouring) and needs to be told how to get back into a proper rhythm again. Don't panic, there are also ways to help a stopped heart too (if life is still viable), such as injecting certain medications.

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#29

Grass evolved 66 million years ago.

Dinosaurs went extinct 65 million years ago.

The vast majority of dinosaurs never existed at the same time as grass.

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#30

Someone Asked, ‘What’s A Cool Fun Fact That You Know?’, 40 People Delivered Cuttlefish can accurately match the color and texture of their environment despite the fact that they’re colorblind.

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

That implies that other species that have camouflage capabilities do so by looking at the environment and determining their color and texture. Color blindness is irrelevant to that ability for all creatures that have that ability.

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#31

Koalas are literally smooth-brained, so much so that if you put a plate of eucalyptus leaves in front of them that have been taken off the branch, they won’t recognize them as food.

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#32

Someone Asked, ‘What’s A Cool Fun Fact That You Know?’, 40 People Delivered The Nazis planned to assassinate Winston Churchill with an explosive chocolate bar.

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

They had some Oompa Loompas on standby to sing a song about it once the assassination was complete.

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#33

16⁰C and 28⁰C reversed are equal to their Fahrenheit value. So - 16 is 61f and 28 is 82f

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#34

Someone Asked, ‘What’s A Cool Fun Fact That You Know?’, 40 People Delivered Marlon Brando popularised wearing a T-shirt casually.

New_Fix6213 , wikimedia Report

#35

There are more plastic flamingo lawn ornaments in the US than there are wild flamingoes on the entire planet.

SnowDemonAkuma Report

#36

There is a plant called the California Corn Lilly that contains a drug called Cyclopamine. When animals eat it while pregnant, it can cause cyclopia (one eye). It inhibits a signaling pathway called the Sonic Hedgehog Pathway (yes, this pathway was actually named after the video game).

Rubicksgamer Report

#37

Someone Asked, ‘What’s A Cool Fun Fact That You Know?’, 40 People Delivered The only artist to ever have five albums in the US Top 20 at the same time is Herb Alpert & The Tijuana Brass.

Vestido_Amarratado Report

#38

Someone Asked, ‘What’s A Cool Fun Fact That You Know?’, 40 People Delivered Apparently turtles breathe from their booty.

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#39

Nuclear reactors are very fancy kettles.

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

All methods of electricity generation that doesn't use direct application of driver to turbine is a kettle for a steam turbine.

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#40

Someone Asked, ‘What’s A Cool Fun Fact That You Know?’, 40 People Delivered If you fold a regular piece of paper in half 104 (from memory) times, the paper will be as thick as the entire observable universe.

SneakyMongoosee , unsplash Report

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

And if you fold a piece of paper more than 300 times you end up with a book that has more pages than atoms in the observable universe

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Note: this post originally had 96 images. It’s been shortened to the top 40 images based on user votes.