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Article created by: Mindaugas Balčiauskas

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

Man and child sitting on stone steps outdoors, illustrating today I learned facts and it's never too late to learn. 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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    #2

    NASA astronaut smiling in blue flight suit next to space shuttle model, symbolizing today I learned facts about space. 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.

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    #3

    Close-up of a rooster with vibrant red comb and wattles, illustrating interesting today I learned facts about nature. TIL Crowing first at dawn is a privilege reserved for the highest ranking rooster.

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    #4

    Vintage black and white scene of three people seated in a parlor, reflecting on today I learned facts about lifelong learning. 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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    #5

    Album cover featuring a man in an orange New York cap and jacket on a dimly lit urban street at night. 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.

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    #6

    Octopus resting on ocean floor, showcasing unique marine life in new pics for today I learned facts. 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.

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    #7

    Sony Walkman earbuds submerged in clear water inside a transparent bottle showcasing innovative tech design. TIL Sony sold its waterproof Walkman in a bottle of water to prove it was really waterproof.

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    #8

    Split image showing Salvador Dalí holding a small wild cat and Yoko Ono wearing sunglasses and a white hat, highlighting interesting facts. 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.

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    #9

    Roll of white toilet paper unrolled slightly on a clean white background illustrating today I learned facts. TIL In the 1930's a selling point for TP started by Northern Tissue company was that their toilet paper was "splinter free"

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    #10

    Bronze statue of Bruce Lee in Hong Kong with city skyline in the background, illustrating facts about learning. 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."

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    #11

    A beaver chewing on a branch in a natural setting illustrating facts about learning from nature today I learned. 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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    #12

    Smiling older woman wearing glasses and a blue jacket, illustrating today I learned facts about it’s never too late to learn. 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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    #13

    Underwater coral reef with yellow fish swimming, illustrating interesting today I learned facts about nature and marine life. 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.

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    #14

    Group of hippos in water, one with mouth open wide, illustrating interesting today I learned facts about animals. TIL that hippo sweat contains a chemical that has an SPF factor to prevent them from getting sunburned.

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    #15

    Close-up of wasps building a hive, illustrating unique facts that show it’s never too late to learn about nature. 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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    #16

    Portrait of an elderly man in glasses beside handwritten notes, illustrating today I learned facts about lifelong learning. 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

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    #17

    Vintage anatomical illustration of brain stem and nerves with labeled parts, highlighting facts about learning and neuroscience. 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.

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    #18

    Vintage Game of Rich Uncle box featuring a cartoon man in a top hat reading a newspaper, symbolizing learning and knowledge. 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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    #19

    Medals being unveiled by formally dressed individuals, symbolizing achievement and the idea that it's never too late to learn. TIL the medals in the Tokyo 2020 Olympic Games are made from metals recovered from recycled cell phones collected since 2017.

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    #20

    Ancient beehive-shaped clay structure under clear sky, illustrating unique architectural facts to learn today. TIL: In 400BC, the Persians invented a way to make ice in the desert using evaporation cooling

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    #21

    Scenic mountain landscape with clear water, trees, and a helicopter on the shore, illustrating facts about learning. 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.

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    #22

    Patuxai monument in Laos surrounded by palm trees, a popular site featured in today I learned facts about learning. 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.

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    #23

    Swimmer in an Olympic pool performing backstroke, illustrating persistence and that it’s never too late to learn new skills. 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

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    #24

    Lifeguard in yellow gear watching the ocean waves from a bright orange beach hut, symbolizing learning and vigilance. 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.

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    #25

    Man smiling while conducting a science experiment with glowing green lights and mist showing today I learned facts 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.

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    #26

    Group of men practicing shooting rifles outdoors, illustrating today I learned facts about it never being too late to learn. 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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    #27

    Brown vintage jug with triple X markings, representing a classic symbol often seen in old-time learning facts and illustrations. 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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    #28

    Two dogs playing on green grass, illustrating today I learned facts about it's never too late to learn concept. 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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    Ryan Green
    Community Member
    7 months ago Created by potrace 1.15, written by Peter Selinger 2001-2017

    humans can and do do this also

    #29

    Red Bull energy drink can standing outdoors, illustrating facts that show it’s never too late to learn. 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.

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