Fun Fact of the Day
One fact a day, the same one for everyone who opens this page. Come back tomorrow and it has changed.
Today's fun fact ·
Fungi are more closely related to animals than to plants. Like us they take in oxygen, and their cell walls contain chitin, the same material found in insect shells.
Nature
Quick answer
Today's fun fact is above, and it is the same fact every other visitor sees today. That is the point. A daily fun fact is only worth mentioning to somebody if they can go and look at the same thing, which a shuffle button cannot give you. It changes at midnight in your own time zone, the last 30 days are listed further down, and all 503 facts are searchable on the main page if you cannot wait.
Why One a Day Beats Fifty at Once
Reading fifty facts in one sitting feels productive and leaves almost nothing behind. This is one of the most consistent findings in memory research: the same material spread over days is remembered far better than the same material crammed into one session, at identical total study time.
One fact a day works because of what happens in the gap. You read it, you forget most of it, and the small effort of pulling it back the next time you encounter it is what actually builds the memory. Fifty in a row removes every gap, so nothing gets rebuilt.
There is a second, less scientific reason. A fact you read among forty-nine others has to compete for your attention. A fact on its own gets all of it.
How to Make the Daily Fact Stick
Three steps, about forty seconds total. They are worth doing because otherwise this is just a nicer-looking scroll.
Read it, then look away and say it out loud in your own words. If you cannot, read it once more and try again. That failure is not wasted time, it is the part that does the work.
Then find where it attaches. A fact with nothing to hook onto disappears; a fact you have connected to something you already know gets pulled back every time you meet that other thing. Finally, tell someone before the day ends. Retelling is the strongest form of recall there is, and it has the side effect of making you better company.
Why Everybody Sees the Same Fact
The fact is picked by date, not at random, from a fixed order set when this page was built. Every visitor on a given day lands on the same one, and nobody can reshuffle their way to a different answer.
If you want to keep tapping instead, the random fact generator draws from the same pool of 503 and gives you a new one on every press. Different tool, different mood. This page is a daily ritual; that one is for when you have ten minutes and a queue to stand in.
The last 30 days
Every fact from the last 30 days, in case you missed one or want to check what you actually remember.
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Anne Frank and Martin Luther King Jr. were born in the same year, 1929. Had she survived the Holocaust, Anne Frank could have watched the Moon landing at just 40 years old.
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In 1800, more than 4 in 10 children died before their fifth birthday. Today it is fewer than 4 in 100, one of the quietest and biggest wins in human history.
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Saudi Arabia is the largest country in the world without a single permanent river. Its water comes from underground aquifers and desalinated seawater.
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Without review, you forget most new information within days. Ebbinghaus mapped this 'forgetting curve' back in 1885, and modern studies keep confirming it: memory fades fast unless you refresh it.
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Enzymes are nature's speed dials. Some make chemical reactions run millions or even billions of times faster, turning a process that would take centuries into one that finishes in a second.
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There are more possible iterations of a game of chess than there are atoms in the observable universe. The number is called the Shannon number: roughly 10^120.
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A woodpecker's tongue is so long it wraps around the back of its skull. Yet a 2022 study found its head works as a stiff hammer, not a shock absorber; its small brain simply stays below the concussion threshold.
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Laughing really does burn calories, just not many. A study in a sealed calorimeter room found that 10 to 15 minutes of genuine laughter a day burns only about 2 to 10 extra calories.
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Water is heaviest at 4 degrees Celsius, not at its freezing point. That quirk lets lakes freeze from the top down, so fish can survive the winter in liquid water below the ice.
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In 1997, IBM's Deep Blue became the first computer to defeat a reigning world chess champion in a match. It evaluated 200 million positions per second; Garry Kasparov managed a handful.
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The Eiffel Tower was meant to be torn down after 20 years. It survived only because its tip turned out to be a perfect radio antenna, too useful to demolish.
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That word stuck on the tip of your tongue is a universal experience. It happens in nearly every language studied, roughly once a week, and the missing word usually surfaces on its own within minutes.
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Junk email is called spam because of Monty Python. In a 1970 sketch, Vikings drown out every conversation by chanting 'Spam, Spam, Spam,' which is exactly how early internet users felt about repetitive junk messages.
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Wi-Fi doesn't stand for anything. A branding agency invented the name because 'IEEE 802.11b Direct Sequence' would never sell. 'Wireless Fidelity' was made up afterward to explain it.
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The QR code was invented in 1994 to track car parts in Japanese factories. Its inventor drew inspiration from the black and white stones of the board game Go, and his company let the world use it for free.
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In 1988, a graduate student's experiment crashed about 10% of the entire internet. The Morris worm led to the first conviction under US hacking law. Its creator is now a professor at MIT.
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Diamond and pencil graphite are both pure carbon. The only difference is how the atoms bond: one arrangement makes the hardest natural material, the other a soft, slippery gray solid.
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Apple had a third founder. In 1976, Ronald Wayne sold his 10 percent stake back for 800 dollars because he feared the financial risk. Ten percent of Apple today is worth hundreds of billions.
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On Mercury, a single day lasts two years. The planet orbits the Sun in 88 Earth days, but from one sunrise to the next, 176 Earth days pass.
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The first transatlantic telegraph cable (1858) was a marvel that barely worked. Queen Victoria's 98-word greeting to the US president took about 16 hours to transmit, and the cable failed for good weeks later.
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Your heart pumps about 7,500 liters of blood a day, enough to fill a small backyard pool, and it does it all over again every single day of your life.
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The Dunbar number suggests people can keep about 150 stable relationships. But a 2021 reanalysis found the data fit anything from about 4 to over 500, so the famous limit is far shakier than it sounds.
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It probably rains diamonds on Neptune and Uranus. Lab experiments show that the extreme pressure inside these planets can squeeze carbon into real diamonds that sink toward the core.
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In a field experiment, a dress priced at 39 dollars outsold the identical dress at 34 dollars. Prices ending in 9 signal 'bargain' so strongly that they can beat genuinely cheaper ones.
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When black holes collide, they shake the fabric of space itself. Detectors on Earth have measured these gravitational waves as distortions thousands of times smaller than a proton.
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In a vacuum, a feather and a bowling ball fall at exactly the same rate. Gravity accelerates every object equally, and only air resistance makes the feather drift. Galileo argued this over 400 years ago.
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You don't search for truth, you search for confirmation. Confirmation bias makes you notice, trust, and remember evidence that supports what you already believe, and gloss over the rest.
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The tongue map is a myth. Every part of your tongue can detect sweet, sour, salty, bitter, and savory, not just certain zones as old diagrams claimed.
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If the Sun were the size of a front door, Earth would be the size of a nickel, and Jupiter would be the size of a basketball.
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Bangladesh has more inhabitants than Russia, on less than 1 percent of Russia's land. About 170 million people share an area roughly the size of the US state of Iowa.
Frequently asked questions
What is the fun fact of the day?
It is at the top of this page, and it changes at midnight in your local time zone. The same fact shows for every visitor on the same date, so you can send someone here and know they will see what you saw.
Is there a new fun fact every day?
Yes. The rota walks through a fixed order drawn from 503 checked facts across science, history, space, psychology, nature, health, technology and society, so no fact repeats for well over a year.
Can I see yesterday's fun fact?
The last 30 days are listed in full further down this page, newest first, with the date each one appeared.
How is this different from a random fact generator?
A generator gives you a different fact on every press, which is good for browsing and useless for sharing. This page gives everyone the same fact on the same day, which is what makes it worth mentioning to somebody. Both draw from the same checked pool.
Where can I find more than one fact a day?
All 503 are searchable and filterable by subject on the fun facts page, and there are deeper guides there by country and by subject.
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