One thing about knowledge is that it shouldn’t be gatekept. And on Reddit’s Today I Learned community, it isn’t.
Here, millions of people come together to share the most surprising, obscure, and fascinating facts they’ve just discovered. Some change how we see the world, while others are simply entertaining—but all of them prove there’s always more to learn.
So here’s your daily dose of curiosity. Keep the cycle going and pass your favorites along!
#1

TIL about Andrew Carnegie, the original billionaire who spent 90% of his fortune creating over 3000 libraries worldwide because a free library was how he gained the education to become wealthy.
301points
#2

TIL Danny Trejo has a clause in his movie contracts that requires his villainous characters to die by the end of the film. He wants children to learn that crime doesn't pay.
Report
261points
#3

TIL April 8th 1945 a prisoner at Buchenwald rigged up a radio transmitter and sent a message in a desperate attempt to contact the allies for rescue. 3 minutes after his message the US Army answered "KZ Bu. Hold out. Rushing to your aid. Staff of Third Army". The camp would be liberated 3 days later.
227points
#4

TIL ecologist Suzanne Simard wanted to know why the forest got sick every time the foresters k****d the birch trees, thought to harm fir trees. She discovered that birch trees actually pass nutrients to fir trees underground via a complex fungal network and were maintaining balance in the ecosystem.
Report
215points
#5

TIL After Joan of Arc was executed on charges of heresy, her mother spent 25 years clearing her name. She convinced the pope to reopen Joan's case and attended the retrial despite being in her 70s and in poor health. The retrial ended with Joan's complete acquittal.
Report
198points
#6

TIL In Japan, the Johatsu, meaning "evaporated people", choose to abandon their current lives - due to family strain, work pressure or any other reason. So-called 'night moving' companies help them disappear without a trace and start a new life somewhere else.
Report
171points
#7

TIL in 2010 a doctor and his son just happened to be walking by an apartment building in Paris when a 15-month-old boy fell 80ft (24m) from a seventh floor balcony before bouncing off a cafe awning into the doctor's arms. His catch helped the boy escape "miraculously without a single scratch."
The toddler had been left alone with his four-year-old sister while their parents reportedly "popped out" for some shopping. They were charged with causing injury through neglect.
Bensignor, 58, a GP, said it was pure luck he was passing while out walking with his seven-year-old son Raphaël, last week.
...
Bensignor said it was thanks to Raphaël that he saved the falling child.
"We were walking and Raphaël was talking to me ... then he looked up and said: 'Papa, have you seen the children on the balcony up there?' There was no panic in his voice, just astonishment."
He said he looked up just as the baby fell.
The toddler had been left alone with his four-year-old sister while their parents reportedly "popped out" for some shopping. They were charged with causing injury through neglect.
Bensignor, 58, a GP, said it was pure luck he was passing while out walking with his seven-year-old son Raphaël, last week.
...
Bensignor said it was thanks to Raphaël that he saved the falling child.
"We were walking and Raphaël was talking to me ... then he looked up and said: 'Papa, have you seen the children on the balcony up there?' There was no panic in his voice, just astonishment."
He said he looked up just as the baby fell.
Report
163points
#8

TIL that 11-year old Ted Danson and his friends chopped down a bunch of billboards around Flagstaff, AZ, because they obstructed views of nature. He was caught when his father, a museum curator, learned that billboards for the Museum of Northern Arizona were spared.
Report
150points
#9

TIL in 2017 a couple survived a wildfire in California by jumping into a neighbors pool and staying submerged for 6 hours. They came up for air only when they needed to, using wet t-shirts to shield their faces from falling embers.
Report
142points
#10

TIL George Washington decided to step down after two terms because he feared he might die in office and Americans would then view the presidency as a lifetime appointment.
Report
135points
#11

TIL Chef Boyardee's canned Ravioli kept WWII soldiers fed and he became the largest supplier of rations during the war. When American soldiers started heading to Europe to fight, Hector Boiardi and brothers Paul and Mario decided to keep the factory open 24/7 in order to produce enough meals.
Report
119points
#12

TIL George Washington is the only U.S. president elected as an independent to date. Washington opposed the development of political parties.
Report
117points
#13

TIL that Weird Al's Phantom Menace parody 'The Saga Begins' was recorded a month before the film released in May 1999. Yankovic was denied an early screening by Lucasfilm, but managed to almost exactly piece together the plot by researching rumours posted on Star Wars fan forums.
Report
115points
#14

TIL about skeuomorphism, when modern objects, real or digital, retain features of previous designs even when they aren't functional. Examples include the very tiny handle on maple syrup bottles, faux buckles on shoes, the floppy disk 'save' icon, or the sound of a shutter on a cell phone camera.
Report
114points
#15

TIL: Phossy Jaw used to be a common affliction among workers in the matchstick industry for decades which destroys the bones of the jaw. While the cause was linked to the use of white phosphorus within 5 years, it took almost a century of strikes, bans, and taxes to stop its use in the industry.
108points
#16
TIL a Jets player who won in Super Bowl 3 lost his super bowl ring shortly after while surfing. It was found in the ocean by a lifeguard who was snorkeling 40 years later and returned to him.
Report
106points
#17

TIL in 2000 a Mexican woman performed an hour-long C-section on herself with a kitchen knife after 12 hours of constant pain. After 3 attempts to cut open her abdomen, she made a 17cm vertical incision (a typical one is 10cm & horizontal). But despite no medical training, both mom & child survived.
Report
105points
#18
TIL Q Lazzarus, singer of Goodbye Horses, was unknown when the song appeared in Silence of the Lambs. Labels had rejected her due to her dreads, so she drove a cab. Once, she picked up "Lambs" director Jonathan Demme, and played him her demo. He responded "Oh my God, what is this and who are you?"
Report
102points
#19

TIL that ancient Rome had fast food restaurants called 'thermopolia,' where people bought hot meals on the go, much like modern takeout.
Report
99points
#20

TIL that in 1997 Mattel released Share a Smile Becky, a disabled Barbie doll, only to discontinue it when the wheelchair couldn't fit through the front door of the Barbie Dreamhouse.
Report
98points



