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In 1947, the seemingly everyday, innocent thoughts of a teen girl were published. But they weren’t so everyday: they were the thoughts of Anne Frank.

In 1855, D.C. residents were anything but thrilled with a gift from the pope.

There was a time when a kilt could get a person in a lot of trouble.

In 1746, tartan kilts were outlawed in Scotland. That ban would help the garment become world-famous.

Signs like this are a familiar sight to visiting teams.

Baseball’s score-keeping system is full of abbreviations, but why exactly is the letter ‘K’ synonymous with a ‘strikeout’? Discover more about the evolution of baseball terms like this here.

Your old soccer balls might still be fine, though.

Plastic bins aren’t great for storing everything. Discover what items you definitely shouldn’t put in plastic bins, like certain fabrics, old photos, and more.

A sunken ship near Florida holds clues to the early history of cats in the U.S.

The megalodon was the largest shark to ever live, but luckily for us, it’s definitely extinct.

No, the golden arches don’t represent two giant bendy French fries on a background of ketchup, but good try.

Golden retrievers have a very family-friendly reputation.

Labrador retrievers, golden retrievers, and poodles are just a few of the dog breeds with family-friendly reputations.

This riddle dates back to 1927—can you figure out the answer?

Determining the world’s smallest country isn’t as easy as simply calculating area or population.

‘Gymkata’ was a flop when it hit theaters in 1985—but today, the so-bad-it’s-good film has a cult following. Here’s what you should know.

Consider these countries if you‘re looking to relocate on a work visa.

Which countries make moving abroad for work a breeze? Europe dominates the list.

History's Greatest Escapes w/ Arturo Castro | Amazing Facts with Mental Floss

The actor just wrapped up a podcast called ‘Greatest Escapes’—and now he’s dropping amazing facts about those escapes and more on the latest episode of Amazing Facts with Mental Floss.

The risks involved with storing an open can of food in the fridge can vary, but according to the USDA, it’s important to keep these factors in mind.

Consider arriving at the airport earlier if you don‘t have a REAL ID.

Starting Wednesday, May 7, standard IDs will make going through airport security a bigger hassle. The TSA recommends getting to the airport earlier than usual to ensure you board your flight on time.

From carrying their young for years to feeding their babies poop, some animal moms just go above and beyond.

We give you an obscure word with four definitions—one correct, three made up. Can you identify the correct one?

The fact that all shells sound just a little bit like the ocean is purely coincidental.

Stress can really get to you if it‘s not controlled.

This ranking breaks down how stress varies across the U.S.—with big differences between regions.

Ben Feldman (‘Monsters at Work,’ ‘Superstore’) sets off into the sunset with Arturo as they hop on the trail of one of the Wild West’s greatest outlaws, Kid Curry.