THE KNOWLEDGE FEED

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Out, Damned Spot!

Meghan Holohan

"Out, damned spot! Out, I say!" laments Lady Macbeth as she attempts to scour an invisible bloodstain in one of Shakespeare's most memorable scenes.

Putting a Good Face on it: The Evolution of Mr. Potato Head

the mag

by Megan

Brain Game: Talking Heads '10

By changing one letter at a time to form different English words, and leaving all other letters in their original positions, convert NEWS into CAST in five (or fewer) steps.

Morning Cup of Links: Inane Inventions

Colin Patrick

Its 1980 eruption caused widespread destruction. Now, the area around Mount St.

The Late Movies: Bizarre Pets

Ransom Riggs

There are a lot of people in my city who have dogs small enough to fit in purses or cages full of exotic birds.

How to Tweet Your Way Out of a Job

Rob Lammle

Hate your job? Want to leave without giving two weeks notice? Thanks to Twitter, it's never been easier to get fired.

Video: The Antikythera Mechanism

Chris Higgins

The Antikythera Mechanism is an ancient artifact discovered circa 1900 CE on a shipwreck known as the Antikythera wreck.

Fox Steals Everyone's Shoes

Jill Harness

Missing one of your shoes and just can't seem to find it? If any foxes live in your area, perhaps you should check their holes.

The Most Frightening Dance You'll Ever See

Mangesh & Jason

Ed note: This post has been sponsored by the Warner Brother's film Invictus, out on DVD and Blu-ray on May 18th.

Bazinga!

David K. Israel

For the first time in the history of the blogosphere, several major sites, including our friends over at Treehugger, Boing Boing and Neatorama, are coming together for a good cause.

Today's 5 Questions

Jason English

Since way back on September 16, 2002, research editors Sandy Wood and Kara Kovalchik have been cranking out daily five-question quizzes.

Brain Game: Math Square #25

The nine white squares inside the main red grid should be filled with the digits 1 through 9. Each digit should appear only once in this main grid. Two of these numbers are already provided for you.

Morning Cup of Links: Grad Gifts for Nerds

Colin Patrick

Are you a die-hard LOST fan still coming to terms with the fact that it will all be over this week?

Strange Geographies: Death in Venice

Ransom Riggs

If you've got the money, you can live in Venice. If you're a romantic, you can die in Venice. But you cannot be buried in Venice.

Last Week's Most Popular Stories

Jason English

In case you weren't obsessively refreshing mentalfloss.com all week, here's what you

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