Facts with receipts

The internet's weirdest true facts, and the proof.

Every fact on Who Knew Daily links to the page we checked it against, with the exact quote that backs it up. If we can't prove it, we don't publish it.

110 sourced facts · 10 fact files · 11 myths busted

Fact of the day · October 31, 2026

Verified

Caesar salad was invented by Caesar Cardini in Tijuana, not named after Julius Caesar.

🧾 See the receipt

“The salad was created on July 4, 1924, by Caesar Cardini at Caesar's in Tijuana, Mexico, when the kitchen was overwhelmed and short on ingredients.”

Source: Caesar salad, Wikipedia. Checked 2026-10-31.

Fact files

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Geography · 12 factsWeird World GeographyA country inside another country, a flag that isn't a rectangle, and the loneliest spot in the ocean.Science & Inventions · 12 factsInventions Discovered by AccidentA melted candy bar, a glue that was too sticky, and a sweet taste on a chemist's hand.Earth & Ocean · 12 factsOcean OdditiesAn 'immortal' jellyfish, a shark that lives for centuries, and a waterfall under the sea.Earth & Ocean · 11 factsEarth's Most Extreme PlacesThe hottest, coldest, deepest and driest spots on the planet, with the numbers to prove it.Words · 11 factsWord Origins You Won't BelieveRobots, quarantines and muscles (which are literally 'little mice'): the stories hidden in everyday words.Food · 10 factsSurprising Origins of Everyday FoodBananas are berries, peanuts aren't nuts, and Caesar salad has nothing to do with Julius.

Myth busters

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Myth“Archaeologists found edible honey in ancient Egyptian tombs”This 'fact' is all over the internet, but no edible honey has been found in Egyptian tombs. Myth“Bulls charge because they hate the color red”Bulls are dichromatic, a kind of color blindness, so the red of the cape is irrelevant to them. Myth“Marie Antoinette said 'Let them eat cake'”There's no evidence she ever said it. The phrase appears in Rousseau's Confessions from when she was nine. Myth“Roman soldiers were paid in salt, which is why we say 'salary'”'Salary' does come from the Latin for salt, but the idea that soldiers were paid in salt has no basis. Myth“Lightning never strikes the same place twice”Lightning often hits the same spot again and again. The Empire State Building gets hit about 23 times a year. Disputed“A falling apple inspired Newton's theory of gravity”Newton told the story himself, but the apple hitting his head is a later invention.

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