Whenever I learn something cool, I get this itching desire to tell someone about it. But as it turns out, I don't have to rush downstairs to interrupt whatever my flatmates are doing and bombard them with interesting yet random facts. I can do it on the Internet, too.

Today I Learned is the 11th most popular subreddit, with nearly 24 million members. All of them are ready to not only share interesting and specific things about something that they just found out but go through other people's discoveries as well. From the reason why cops like donuts to Stephen Hawking pranking an interview crew, the subreddit has amassed loads of incredible trivia since its creation on Dec 28, 2008. Here are some of the most popular ones within the community.

Discover more in 50 Facts From An Online Group Where People Post The Most Interesting Things They Learn And That Has 23 Million Members

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#1

Medical professionals in vintage surgical attire performing a procedure, illustrating fascinating historical medical facts. TIL of Syndrome K: a fake disease that Italian doctors made up to save Jews who had fled to their hospital seeking protection from the Nazis. Syndrome K "patients" were quarantined and the Nazis were told that it was a deadly, disfiguring, and highly contagious illness. They saved at least 20 lives

mentalfloss Report

Astrophysicist Mario Livio thinks that our willingness to learn is, in fact, what makes us human. "Other animals are curious, but only humans are worried and curious about reasons and causes for things. Only humans really ask the question, 'Why?'"

Livio says we're even born with it. "There are many studies that have shown that there is a strong genetic component to curiosity," he explained. "It is also the case that some people are more curious than others, in the same way, that some people have a talent for music and others don't or some people are smarter than others ... But all people are curious, with the possible exception of people who are very deeply depressed or have certain kinds of brain damage."

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    #2

    Elderly man in red shirt lovingly hugging a large white dog, showcasing bond in a 23 million member online group. TIL a guide dog named Roselle led a group of people including her blind owner down 78 flights of stairs before the North Tower collapsed on 9/11. She only stopped to give kisses to a woman who was having a panic attack.

    money.cnn Report

    But testing out a new idea can lead to disaster, too."Curiosity probably led to the vast majority of human populations going extinct," Agustín Fuentes, a professor of anthropology at Princeton University, told Live Science.

    For example, the Inuit of the Arctic regions of Greenland, Canada, and Alaska, and the Sámi people of Europe's northern reaches have "created incredible modes to deal with the challenges" of living in northern climates, but "what we forget about are the probably tens of thousands of populations that tried and failed to make it" in those challenging landscapes," he said. 

    But even though not all curious humans lived to pass their penchant for exploration on to their descendants, many did. We can't help but think, "Huh, I wonder what would happen if ..." and the popularity of the subreddit Today I Learned proves it.

    #3

    Two World War II soldiers in helmets, one throwing a g*****e, in a battlefield with foliage and trees backdrop. TIL hundreds of love letters between two gay World War II soldiers were found and are being made into a book. In one, one of them wrote, "Wouldn't it be wonderful if all our letters could be published in the future in a more enlightened time. Then all the world could see how in love we are."

    mike_pants , U.S. National Archives and Records Administration Report

    #4

    Mosaic artwork of a brown dog on a leash surrounded by stylized plants from an online group sharing interesting facts. TIL Romans were known to create tombs for their dogs and gave them epitaphs to remember them by. One such inscription read, “I am in tears, while carrying you to your last resting place as much as I rejoiced when bringing you home with my own hands 15 years ago.”

    unnaturalorder Report

    #5

    Woman holding an Oscar statuette smiling at an awards event, highlighting facts from a popular online group with millions of members. TIL Kate Winslet keeps her Oscar in the bathroom so her guests can hold it and make acceptance speeches in the mirror without feeling self conscious

    DylaramaGladney , Kate Winslet Report

    Data1001
    Community Member
    2 weeks ago Created by potrace 1.15, written by Peter Selinger 2001-2017

    How can you not love this lady!

    #6

    Black and white photo of a man smiling in a wheelchair, representing facts shared in an online group with 23 million members. TIL During an interview with Stephen Hawking, the camera operator yanked a cable causing an alarm and Hawking to slump forward. Worried they had killed him, everyone rushed over to find Hawking giggling at his own joke. The alarm was from an office computer losing power.

    biography Report

    Data1001
    Community Member
    2 weeks ago Created by potrace 1.15, written by Peter Selinger 2001-2017

    I loved his appearance on Star Trek: The Next Generation, playing himself.

    #7

    Close-up of a man wearing glasses and a suit, representing members of an online group sharing interesting facts. TIL of Dr. Donald Hopkins. He helped eradicate Smallpox, and is on the verge of killing another disease. He's taken Guinea Worm Disease down from 3.5 million cases a year to just 28 cases last year.

    atlantamagazine Report

    #8

    Smiling astronaut in blue NASA suit posing with space shuttle model, symbolizing interesting facts from a large online group. TIL In 1959, police were called to a segregated library in S. Carolina when a 9yr-old Black boy refused to leave. He later got a PhD in Physics from MIT, and died in 1986, one of the astronauts aboard the space shuttle Challenger. The library that refused to lend him books is now named after him.

    wikipedia Report

    Data1001
    Community Member
    2 weeks ago Created by potrace 1.15, written by Peter Selinger 2001-2017

    Come on, at least put his name in the entry! People shouldn't have to click the link to see that. Ronald Erwin McNair - (October 21, 1950 – January 28, 1986). #RIP

    #9

    Young man smoking a cigarette outdoors, representing an online group with 23 million members sharing interesting facts. TIL A Japanese company has awarded its non-smoking employees 6 extra vacation days to compensate for the smoker’s smoke breaks

    cnbc Report

    #10

    Person opening glass door at modern office entrance with Cantor Fitzgerald logo on a marble wall, online group facts theme. TIL that the firm Cantor Fitzgerald lost 658 employees on 9/11. The CEO, who was taking his child to school that day, later distributed $180 million to the families and offered jobs to all children of the victims. 57 of those children were employed by Cantor Fitzgerald as of 2016.

    theremarkableamoeba Report

    #11

    Group of people in camouflage uniforms marching together outdoors, representing a large online community sharing interesting facts. TIL that in 1916 there was a proposed Amendment to the US Constitution that would put all acts of war to a national vote, and anyone voting yes would have to register as a volunteer for service in the United States Army

    bpbucko614 Report

    #12

    Community members including a police officer and child at a snack stand, highlighting facts from a large online group. TIL that a 13-year-old opened a hot dog stand in front of his home in Minnesota, causing a complaint to the health department. Instead of shutting him down, the inspectors helped him bring his stand up to code and paid the $87 fee for his permit out of their own pockets

    ukriva13 Report

    #13

    Hand filling out an organ donor notification card focused on donation consent and medical research, highlighting interesting health facts. TIL that everyone in Singapore above the age of 21 is automatically registered as an organ donor. Opting out from this Act will result in you being put at the very bottom of the organ priority list, should you need an organ transplantation.

    _crash182 , buffalonews Report

    #14

    A black and white skunk walking on grass, representing interesting facts shared by an online group with millions of members. TIL Dogs get sprayed by Skunks so often because Skunks lift their tails as a warning, Dogs see this as "Come smell my butt" which is the EXACT OPPOSITE MESSAGE from what the Skunk is trying to send.

    discoverwildcare , Jon Gwinn Report

    Data1001
    Community Member
    2 weeks ago (edited) Created by potrace 1.15, written by Peter Selinger 2001-2017

    Oopsie! 😂 Dog: "But mom, he wanted to be friends!"

    #15

    Man in wheelchair with communication device talking to two men outdoors at a gathering in an online group sharing interesting facts. TIL that there was a rumor that Stephen Hawking would deliberately run over the toes of people he didn’t like. He denied this rumor by stating it was “A Malicious rumor” and “I’ll run over anyone who repeats it”.

    RoundToZero Report

    #16

    Commercial airplane with significant damage near the rear exit door, illustrating unusual aviation incident facts. TIL a suicide bomber with explosives in his laptop boarded the Somali owned Daallo Airlines in 2016 intending to blow the whole aircraft. Twenty minutes after the takeoff, the bomb exploded, creating a hole in the plane, and the suicide bomber was sucked out of the plane. He was the only fatality.

    cnn Report

    See Also on Bored Panda
    #17

    Man with multiple gold chains and feathers, showcasing a bold style in a vibrant portrait for an online group post. TIL: Laurence Tureaud named himself professionally as Mr. T because he hated how his father, uncle, and brother who returned from Vietnam, were disrespectfully called "boy" by whites. He wanted the first word from everybody's mouth to be "Mister" when speaking to him

    wikipedia , MrT Report

    #18

    Man in a tuxedo with a white flower behind his ear, smiling while holding a small white flower, candid moment. TIL actor Robert Pattinson dealt with an obsessed fan who had been camping outside his apartment by taking her out on a dinner date. "I just complained about everything in my life and she never came back."

    today Report

    Data1001
    Community Member
    2 weeks ago Created by potrace 1.15, written by Peter Selinger 2001-2017

    It's also partly the unattainable quality that no doubt made him a subject of obsession. I've always thought that freely making yourself available will also work with paparazzi. Celebs make themselves a hotter commodity to the press by being aloof and trying to avoid them. The ones that are hounded are the ones who won't give the time of day, so the photographers know that if *they* can get that one picture, it'll be worth a lot more. But the ones who are open with their time and are easily accessible become a bit less interesting at the very least, and are generally treated well in return.

    #19

    Man in wooden boat paddling near large flock of ducks on calm water, illustrating interesting facts from online group. TIL: Some farmers in Bangladesh have switched to raising ducks instead of chickens, because during catastrophic floods, ducks float.

    Thebadmamajama Report

    #20

    Two men in black suits posing against a dark red background for an online group with 23 million members. TIL Keanu Reeves often foregoes some of his paycheck so that producers can bring on other notable actors. On The Devil's Advocate, he reduced his salary by a few million dollars so that they could afford Al Pacino, and he did the same thing on The Replacements to be able to work with Gene Hackman.

    LanterneRougeOG , shutterstock Report

    #21

    Underwater image of a heavily rusted shipwreck bow, illustrating fascinating facts shared in a large online group. TIL when Robert Ballard (professor of oceanography) announced a mission to find the Titanic, it was a cover story for a classified mission to search for lost nuclear submarines. They finished before they were due back, so the team spent the extra time looking for the Titanic and actually found it.

    Planet6EQUJ5 Report

    #22

    Black and white close-up portrait of a bearded man, related to facts from an online group with millions of members. TIL an actor in Nazi Germany lost his job for being Jewish. He went to the Alps, grew a beard, and dyed all his hair by bathing in diluted hydrogen. He returned to the stage claiming to be a self-taught peasant actor and was praised by the Nazis as "proof of the superiority of Aryan blood."

    wikipedia Report

    Data1001
    Community Member
    2 weeks ago Created by potrace 1.15, written by Peter Selinger 2001-2017

    "Diluted hydrogen" -- is that the same as hydrogen peroxide?

    #23

    Black and white image of a serious man in a suit seated at a desk, symbolizing an online group sharing interesting facts. TIL Max Planck was told by his professor to not go into Physics because "almost everything is already discovered". Planck said he didn't want to discover anything, just learn the fundamentals. He went on to originate quantum theory and win a Nobel Prize.

    wikipedia Report

    #24

    Man wearing a gray jacket and gloves holding a weapon, related to an online group with 23 million members sharing facts. TIL Arnold Schwarzenegger wasn't allowed to dub his own role in Terminator in German, as his accent is considered very rural by German/Austrian standards and it would be too ridiculous to have a death machine from the future come back in time and sound like a hillbilly.

    blog.esl-languages Report

    #25

    Stephen Hawking's grave with engraved black plaque showing a scientific formula and surrounded by flowers in a memorial site. TIL The ashes of Stephen Hawking were buried between the graves of Isaac Newton and Charles Darwin, in a section of Westminster Abbey known as the "Scientists Corner." As a final tribute, during the burial, the European Space Agency beamed recordings of Hawking's voice to the nearest black hole

    nbcnews Report

    #26

    Older man wearing a tropical shirt at a convention with artwork and people in the background, representing an online group. TIL Gary Gygax's wife was convinced he was having an affair so she followed him to a dimly lit basement and burst into the room only to find him and his friends hunched over hand drawn maps. Gary would go on to invent the role playing game "Dungeons and Dragons"

    wikipedia , wikipedia Report

    Data1001
    Community Member
    2 weeks ago Created by potrace 1.15, written by Peter Selinger 2001-2017

    Oh, Mrs. Gygax -- if only it *was* an affair. That would consume far less of your husband's time and attention than D&D, haha.

    See Also on Bored Panda
    #27

    Man in a suit presenting on a television set with a screen showing Ask Dr. Oz logo and discussing interesting facts. TIL Canadian researchers watched 40 episodes of 'The Dr. Oz Show' and found that nearly 40% of the medical advice is not evidence-based, and 15% goes directly against evidence.

    truehalf , doctoroz Report

    #28

    Police officer eating a doughnut inside a patrol car, illustrating common facts from an online group with millions of members. TIL that in the 1950's, donut shops were some of the first food businesses commonly open late at night. They became hot spots for police working the night shift since it gave them a place to grab a snack, fill out paper work, or even just take a break. This is why donuts became associated with cops.

    smithsonianmag Report

    Data1001
    Community Member
    2 weeks ago Created by potrace 1.15, written by Peter Selinger 2001-2017

    🎵"All the cops in the donut shops go 'Way-oh, way-oh, wayoh way-ohhhh...'" 🎶

    #29

    Person setting up a laptop next to a large screen displaying a colorful BBC logo in a dark presentation room. TIL BBC journalists requested an interview with Facebook because they weren't removing child abuse photos. Facebook asked to be sent the photos as proof. When journalists sent the photos, Facebook reported the them to the police because distributing child abuse imagery is illegal

    BenChapmanOfficial Report

    #30

    Woman with curly hair speaking into a microphone during a testimony, with an American flag in the background. TIL a waitress was tipped a lottery ticket and won $10,000,000. She was then sued by her colleagues for their share. Then she was sued by the man who tipped her the ticket. Then she was kidnapped by her ex husband, and shot him in the chest. Then she went to court against the IRS

    al Report