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THE KNOWLEDGE FEED

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Engineer Creates Working Mini Pipe Organ Made Entirely From Paper

Kirstin Fawcett

It's playable, too.

The History of the Conversation Heart

Erin Blakemore

Valentine's Day means chalky candy hearts with a lot to say. But what's behind these very loud little candies?

5 Questions: Be My "Valentine"

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10 Untranslatable Words to Describe Love in Other Languages

Shaunacy Ferro

In Portuguese, there's a specific word for the feeling of running your fingers through someone's hair.

Burger King Israel is Offering a Very Adult Happy Meal

Jake Rossen

The blindfold is presumably so you can't see how much junk food you're shoveling in your mouth.

WWI Centennial: French Arrest Mata Hari

Erik Sass

Erik Sass is covering the events of the war exactly 100 years after they happened. This is the 267th installment in the series.

New Imaging Technique Reveals Baby Pictures of Our Universe

Kate Horowitz

Clearing visual noise from Hubble images exposed glittering fields of old, old, old galaxies.

Would You Have Passed This 1920s Pronunciation Test?

Paul Anthony Jones

"Penelope Cholmondely raised her azure eyes from the crabbed scenario" is just the beginning.

What a Square Mile of a City's Grid Looks Like Around the World

Shaunacy Ferro

Compare the unique layouts of Atlanta, Rome, Tunis, and more.

We're Blown Away by These Pop-Up Cards

Mental Floss Studios

Lovepop Cards is a startup that blends computer modeling with an intricate paper cutting technique. The result: A gorgeous work of art that doubles as greeting and gift.

How to Turn Your Yoga Practice Into a HIIT Session

Kirstin Fawcett

All you need to do is kick up the pace a few notches.

6 Unexpected Consequences of a Solar Eclipse

Mental Floss UK

Fear ye not, stargazer.

Virtual Reality App 'Art Plunge' Takes You Inside Your Favorite Paintings

Shaunacy Ferro

It's virtual reality meets art history.

The Most Popular Girl Scout Cookie in Each State

Kirstin Fawcett

See which flavor made the cut in your state.

7 Tips for Finding Rewarding Volunteer Work

Jake Rossen

Donating your time can be emotionally rewarding (and tax-deductible).

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