THE KNOWLEDGE FEED

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At the Libraries: Horrendous Book Covers from the '80s

Miss Kathleen

Time for another week of book- and library-related fun!

10 More Trademarked Words

Lauren Harrell

After we published our list of 25 Brand Names People Incorrectly Use as Generic Terms, our wonderful readers responded with a host of other trademarked words and brand names that often get used as nou

Phrase Origins: The Real McCoy and On The Wagon

David K. Israel

We use these hackneyed expressions all the time (hence the hackneyed element), but where do they come from?

What Were Your Baby Teeth Worth?

Jason English

On Fridays, I post a series of unrelated questions meant to spark conversation in the comments. Answer one, answer all, respond to someone else's reply, whatever you want.

We Love Lucy! Secrets From Your Favorite Episodes for Lucille Ball's 100th Birthday

Kara Kovalchik

Leonard McCombe/TIME & LIFE Pictures Tomorrow would have been Lucille Ball’s 100th birthday.

When It Comes to Facial Recognition, Caricatures Beat Photos

Brett Savage

We have a little saying around here—If the Hamburg Data Protection Authority doesn't like it, we don't like it either.

4 Bloody Family Feuds in American History

Rob Lammle

If you have a disagreement with your neighbor today, you might head to small-claims court to settle the dispute.

Rare Shel Silverstein Videos

Chris Higgins

Did you know that Shel Silverstein wrote "A Boy Named Sue," the song made famous by Johnny Cash?

The Weird Week in Review

Miss Cellania

Runaway Floating Island An inflated sculpture named "Is Land" was deployed at the Secret Garden Party music festival in Cambridgeshire, England.

Brain Game: Really, Really Bad Rebus #28

Enjoy a new Really, Really Bad Rebus for the Friday Free-for-all segment at the mentalfloss.com Brain Game. Is it me, or are the rebuses getting better? Or worse?

Morning Cup of Links: Mars River

Miss Cellania

NASA's Mars Reconnaissance Orbiter is sending back data that may indicate that the red planet has some flowing water during part of the Martian year.

A (Blue) Scapegoat for the Dow's Recent Plunge

Jason English

"The Dow has lost nearly 1,000 points since the Smurfs rang the opening bell, in case we're looking to pin this on someone." —Tim Siedell, via

The Number of the Day: $20

Colin Patrick

Former Pittsburgh Steelers coach Ray Horton recently sold his red 1999 Mercedes SL500 convertible to a Steelers cafeteria worker named Maurice Matthews for all the money Matthews had in his pocket at

The Bush Family Posing on an Elephant in 1964

Jason English

The original caption says it's a statue. But it fooled me long enough to start searching for other pictures of future presidents posing with extra large animals.

14 Great Examples of Geeky Fine Art

Jill Harness

Fine art is alive and well, and artists often incorporate the fun aspects of pop culture—particularly the geek side of the spectrum. 1. Headless

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