THE KNOWLEDGE FEED

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Meet the 7 Designers Behind These Iconic Book Covers

Stacy Conradt

Go ahead and judge these unforgettable covers.

Handy Device Shows Where Patient's Veins Are Located

Rebecca OConnell

The VeinViewer uses harmless, near-infrared light to show precisely where veins are located and take the guesswork out of the process.

Small Details From 'Inside Out' Differ Depending On What Country You See It In

Rebecca OConnell

Certain plot points would get lost in translation.

Buzz Aldrin Had to File an Expense Report For His Trip to the Moon

Shaunacy Ferro

Bureaucracy extends to space.

When Vladimir Nabokov Met Dr. Seuss

Caitlin Schneider

When the two writers met at a conference in 1949, it was mutual admiration at first sight.

How Uneducated Butchers and Barbers Became Today’s Skilled Surgeons

Suzanne Raga

Before anesthesia, surgery wasn't considered the work of a licensed medical professional.

The Sydney Opera House's Architect Never Saw His Design Completed

Jamie Wiebe

Jørn Utzon, the architect behind Sydney's famed Opera House, never got to see his greatest achievement completed.

Why Is L.A. Traffic So Awful?

Lana Schwartz

Morning Cup of Links: Difficult TV Pets

Miss Cellania

These links are a great way to start your day!

Caterpillar's Sugary Cocktail Transforms Ants Into Aggressive Bodyguards

Hannah Keyser

Some ants love this caterpillar's sugary secretions—but once they drink it, the caterpillar rules them.

5 Questions: Dishwashing Liquid

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Get mental_floss Magazine's Big Questions Issue for Free!

Jessanne Collins the mag

Could a koala frame you for a crime? Find out in the September issue of mental_floss Magazine!

47 More Words That Sound Rude (But Actually Aren’t)

Paul Anthony Jones

These words sound a lot more suspect than their fairly mundane meanings might suggest.

The History (and Many Looks) of the Penguin Books Logo

Caitlin Schneider

A look back at the many transformations of one of the most recognizable mascots in the world.

25 Fascinating Facts About Dreams

Alvin Ward

John Green breaks down some little-known facts about what happens to our brains in la-la land.

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