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The human brain has about one billion neurons. Each neuron forms about 1,000 connections to other neurons, making up more than a trillion connections. If each neuron could only help store a single memory, you might have only a few gigabytes of storage space. But neurons combine so that each one helps with many memories at a time, exponentially increasing the brain's memory storage capacity to something close to 2.5 petabytes (or a million gigabytes).

To put that into perspective, imagine your brain like a digital TV recorder. 2.5 petabytes would be enough to hold three million hours of TV shows — you could leave the TV running continuously for more than 300 years.

That's a lot of storage. So why waste it? Today I Learned, often shortened as TIL, is one of the biggest communities on Reddit. It has 25.9 million members, constantly sharing interesting trivia like the location of the clearest lake in the world or the reason why Nas listed his then 7-year-old daughter as an executive producer on his fifth album. To put some of your 2.5 petabytes to good use, we rounded up some of the best posts we could find on the subreddit.

However, since you will probably have a few megabytes to spare even after you finish scrolling through the list, fire up our older publications on Today I Learned here, here, and here.

#1

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL that March 12th, 1990, over 60 disability rights activists abandoned their mobility aids and climbed, crawled, and edged up the 83 stone steps of the U.S Capitol, demanding the passage of the Americans with Disabilities Act, which had been stalled in Congress. It was called the 'Capitol Crawl'.

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

It's disgusting that they should have to do that. I hope it.was passed swiftly.

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#2

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) Nas listed his then 7-year-old daughter, Destiny Jones, as an executive producer on his fifth studio album Stillmatic to ensure she would always receive royalty checks from the album.

trifletruffles Report

#3

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL the medals in the Tokyo 2020 Olympic Games are made from metals recovered from recycled cell phones collected since 2017.

MelonMuenster Report

#4

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL: In 400BC, the Persians invented a way to make ice in the desert using evaporation cooling

dismygyans Report

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#5

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL the clearest lake in the world is the Blue Lake located in Nelson, New Zealand. Visibility in the lake is up to 80 metres meaning the water is considered almost as optically clear as distilled water.

Pazluz Report

#6

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL the US provided Laos with funds and concrete to expand an airport which could serve as a base for US fighter jets during the Vietnam War. But as the funds and concrete arrived before any contract was signed, Laos decided instead to build a memorial to soldiers who died in World War II.

trifletruffles Report

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

Technically the US gave them the money, then the US decided to keep it all the Thailand for fighter jets and told Laos they could do anything, as long as it was US approved.

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#7

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL Octopuses are one of the most intelligent creatures on the planet, capable of solving complex puzzles, using tools, escaping captivity, and planning ahead in the future.

umartin404 Report

#8

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL of Eric Moussambani, who had never seen an olympic sized swimming pool before the 2000 olympics. He recorded the slowest time in 100m freestyle history at 1:52.72, however won his heat as all other competitors false started. He is now a national hero the head swimming coach of Equatorial Guinea

jbomber1 Report

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#9

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL of Charlie Walker, the first non-government individual to fly into space. After NASA deemed him unqualified and rejected his 1978 application for astronaut, he co-developed a space bound device which required him to accompany it. Walker flew into space three times with the device he co-patented.

WhileFalseRepeat Report

#10

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL Drowning people almost never shout, thrash or wave for help. 10% of children who drown are supervised by adults who don't recognise the signs.

Boborovski Report

#11

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL Crowing first at dawn is a privilege reserved for the highest ranking rooster.

bawledannephat Report

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

Social status is based on the one who gets to shout first. More like a Presidential campaign

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#12

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL Sony sold its waterproof Walkman in a bottle of water to prove it was really waterproof.

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

OMG , OMG, OMG ---- i didn't know there were real Walkman's. I've been buying these expensive water bottles, drinking the contents and throwing the Walkman's away.

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#13

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL Salvador Dali once conned Yoko Ono into paying $10,000 for a single blade of grass. Yoko had offered to pay that amount for one of his mustache hairs. He substituted the blade of grass because he thought that Yoko Ono was a witch and might use his hair in a spell.

Captain_Moseby Report

#14

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL In the 1930's a selling point for TP started by Northern Tissue company was that their toilet paper was "splinter free"

YoMomsHubby Report

#15

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL Bruce Lee was the winner of the 1958 Hong Kong Cha-Cha Dancing Championship. He kept a card with 108 different cha-cha dance steps in his wallet and developed new moves which he wrote down in a personal notebook labeled "Cha-Cha Fancy Steps."

trifletruffles Report

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Vermillion Ace #443
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Gotta wonder if that explains the fancy footwork he applied in his own movements. It kinda makes sense knowing this tidbit now.

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#16

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL beavers build their dams as an instinct to stop the sounds of water leaks. If a speaker is playing just the sound of running water, a beaver will build a dam over it. This is even if it’s over concrete with no visible water, or if an actual nearby leaky water source is quieter than the speaker.

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#17

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL astrophysicist Jocelyn Bell Burnell, who as a student discovered pulsars, credits her discovery to impostor syndrome and a fear of being kicked out of college; “I’m a bit of a fighter, so I decided until they threw me out I would work my very hardest". That discovery earned the 1974 Nobel Prize.

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#18

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL that when his father died of a heart attack, Ronald Mallett resolved to discover time travel to see him again. He went on to earn a PhD in physics and become a professor, and has been working on plans for a time machine ever since.

ShabtaiBenOron Report

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

Oh that's a sweet and sad and noble reason to pursue science. Thinking about time in any form other than linear is beyond me, and tangents are too complex! Butterfly effect and all that

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

What do we want? Time travel! When do we want it? Doesn't matter.

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

Somebody text me me when he gets it right. I have to go back and change a regrettable outfit I once wore to a party.

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

His dad must be really special if ur gonna make a whole time machine just to see him again

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

Gosh, he was only 10 when his dad passed. His younger brother is a talented artist, what an amazing family!

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

Everyone knows the best way to invent time travel is to want to do it really bad, then just sit back and wait for future you to show up with the machine ready to go!

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

A time travel machine would be THE ABSOLUTE worst thing we've ever invented! WAY way way above gunpowder or nukes!

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

Then he should stop playing with the physical, & start examining the metaphysical. Just saying.

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

Idk why this reminds me of Tom Hanks The Terminal. Maybe the part he says "Made me promise, I keep promise". Idk...

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

You cannot travel into the past BECAUSE YOU DIDN'T TRAVEL INTO THE PAST.

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

Or process his grief... would be a much better use of funds as time is a relative construct

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#19

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL In 1908, the Russian shooting team arrived at the London Olympics twelve days late. The Russian team had made sure to arrive a few days before the event was scheduled, but Russia still used the Julian calendar. The UK had switched to the Gregorian calendar 150 years earlier

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

The Russian government has switched to the Gregorian calendar, but the Russian Orthodox Church still uses the Julian one! Russia switch in Feb 1918 when Lenin signed the Sovnarkom decree.

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#20

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL dying coral reefs lack the sound attract new fish. Speakers playing healthy reef noises at dying coral reefs increases species diversity and doubles fish abundance.

fighterace00 Report

#21

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL that hippo sweat contains a chemical that has an SPF factor to prevent them from getting sunburned.

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

In Dutch, hippo is nijlpaard, which literally means Nile horse.

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#22

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL - Raccoons and skunks will literally sniff out a yellow jacket nest at night and dig it up to eat the yellow jackets.

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#23

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL the X's often seen on moonshine bottles in old cartoons, etc. represent the amount of runnings, or how many times it was distilled.

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

Oh Cletus you old dog. Giving Homer a bottle with 12 or so X’s. ;) [Simpson’s Refernece]

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#24

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL that female dogs can get pregnant by multiple male dogs within the same heat cycle, then give birth to X amount of puppies per father.

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#25

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL comedy legend Mel Brooks was an uncredited producer of The Elephant Man, released in 1980. He was left off the credits for fear that fans would believe the movie was a comedy.

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

This is also true of Frances (1982) and David Cronenberg's The Fly (1986). He also kept his name off the comedy My Favorite Year (1982), possibly because he didn't want people to think it was HIS sort of comedy.

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#26

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL of Research during 1950s all-male combat aircraft assignments revealed that a woman's voice was more likely to gain the attention of young men in distracting situations. Joan Elms voice was used for the automated voice warnings for Convair B-58 and was named "Sexy Sally" by the pilots.

rainbowarriorhere Report

#27

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL of Vasili Mitrokhin, a KGB archivist who kept a vast collection of handwritten notes on top secret files. When he defected to British Intelligence in 1992, he brought six trunks of notes with him that exposed most KGB activities in the West during the Cold War

Rob-With-One-B Report

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M O'Connell
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

I'm surprised the KGB wouldn't have known that he had 6 trunks worth of notes.

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#28

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL that the reticular activating system is the part of the brain that sorts through all the billions of pieces of information our senses take in and then allows through the important stuff. It is why after you a buy a red sedan, you now see red sedans everywhere when you didn't notice them before.

jafo410 Report

#29

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL that the "Monopoly Man", the guy in jail and the policeman on the Monopoly Board all have names: Milburn Pennybags, Jake the Jailbird and Officer Mallory

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

Also, the game was originally created to show the negative aspects of monopolies. And there were two rule sets for the game, one where everyone was rewarded when wealth was created, and second where you were supposed to crush opponents.

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#30

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL that the Red Bull energy drink was originally invented by a duck farmer from Thailand as a hangover cure (called Krathing Daeng in Thai) before being bought over by Austrian businessman Dietrich Mateschitz who discovered it on a business trip in 1987.

studyinthai333 Report

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#31

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL that there is a spider called the Darwin's bark spider whos web is 10x stronger than kevlar. it is the toughest biological material ever studied..

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#32

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL in Greenland, it is illegal to bring any other breed of dog north of the Arctic Circle in order to maintain the purity of the Greenland Dog.

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

If it's a healthy breed of dog, that's a good thing, so no one will be able to change the traits of the breed, like a flat snout with respiratory problems and other things like that

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#33

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL the idea for the McDonald's Happy Meal originated in Guatemala. Created by manager Yolanda Fernández de Cofiño to simplify the menu for busy parents, it was later brought to the attention of the Chicago office who developed it further and deployed it in the U.S.

spiffyP Report

#34

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL it is not recommended to flush a scorpion down a toilet, as scorpions can survive being under the water hence they may come back out that same toilet or crawl up the drains and into your home

ahm713 Report

#35

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL that MIT created a system that provides cooling with no electricity. It was tested in a blazing hot Chilean desert and achieved a cooling of 13C compared to the hot surroundings

Ocean_Beast Report

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

Oh God that would be so useful! We are burning from the heat wave right now and I don't even wanna think of the electricity bills!!!!

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#36

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL Leonardo da Vinci wrote “all the branches of a tree at every stage of its height when put together are equal in thickness to the trunk”. In 2011 Christophe Eloy investigated and found that trees which followed Leonardo's rule would be the best at resisting wind-induced fracture.

jamescookenotthatone Report

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#37

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL in 1999, Tom Green hung his own unauthorized piece of art in the National Gallery of Canada (which remained untouched for days) with the added twist of later coming back and vandalizing it to the horror of onlooking patrons.

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#38

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL Anthony Rossi who founded Tropicana Products in 1945 was an Italian immigrant who arrived in the US with $25 and did not know English. He developed an orange juice pasteurization process to allow transport from the factory in Florida to as far away as New York starting in 1970.

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

1970?? Seems a bit late, date wise. Maybe I'm not getting the whole story.

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#39

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL of a study to determine contamination levels for computer keyboards in the average office setting. One keyboard had to be removed after testing because it was found to be five times dirtier than a toilet seat, home to 150 times the acceptable limit of bacteria, and was a health risk to its user.

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

Seems legit. In high school biology, we had to swab for germs. The grodiest places were keyboards, wrestling mats, and one poor kid's cast.

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#40

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL There was an elevator driver strike in NYC in 1945. Up until then people were afraid to use automatic elevators but the strike drove their mass adoption. The elevator driver job driver demand started to decline which ultimately meant their job is lost forever.

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#41

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) Til Russian fishermen learned to farm caviar as early as the 12th century and for centuries it was considered nothing more than cheap peasant food, served with porridge and eaten by the bowlful

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

That's how I see it today. It's horrible. Whoever marketed it as a delicacy pulled a right stroke.

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#42

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL tarantula hawk wasp larva creates a small hole in a paralyzed spider's abdomen, then enters and feeds voraciously, avoiding vital organs for as long as possible to keep the spider alive. It emerges several weeks later as a wasp.

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#43

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL Olympic swimming is only timed to hundredths of a second because the pools aren’t built to the millimeter tolerances necessary to measure thousandths of a second

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#44

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL the FICO credit score was started in 1989 and people used to be able to get approved for a mortgage with a letter of recommendation from their priest

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

US credit scores are a scam. Why does paying years of rent on time not help your credit score rise? Why does having no credit card count against you? There are so many ways these scores are meant to push you into spending money and using credit. Fine if you want to do those things but you should NOT be penalized if you don't.

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#45

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL: the US Gov't made a deal with the Italian Mafia to ensure that no German or Italian saboteurs snuck in through the New York port/docks by providing information to the US Navy. They also guaranteed no dockworkers would strike, therefore ensuring a constant line of supplies leaving to the front.

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

Mafia leaders had plans to assassinate Hitler, and the mayor of New York ask the Mob to beat up Nazi sympathizers in the US. They did it for free! Back when fascism was bad... https://allthatsinteresting.com/meyer-lansky-punch-a-nazi

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#46

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL A missing DJ’s body was found nearly mummified within the walls of a bar soon after Winnipeg instituted a no smoking in bars law. Before the ban, the smell of cigarette smoke covered up the smell of his decomposing body.

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

I find this very hard to believe... I have smelt a dead rat in the wall... it STINKS!!! Cigarette smokes reeks.... but more than a decaying body????

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#47

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL Bangladesh, the 8th largest country in the world (population of 170 million), is the most populated country to have never won an Olympic medal.

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

To be fair, they've only participated in 10 Olympics and sent a grand total of 49 athletes to all those Olympics combined. Russia, the 9th most populous country, has sent 333 athletes this year alone.

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#48

30 ‘Today I Learned’ Facts That Show It’s Never Too Late To Learn (New Pics) TIL that “freestyle” is a swimming event, not a swimming stroke. The name of the most commonly used stroke in freestyle races is the “front crawl” but swimmers are free to use any stroke they prefer.

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