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The Only Math Museum in the U.S. Just Opened

Erin McCarthy

Math has been intimidating and worrying students (and their parents) since humans starting adding and subtracting.

Weekend Links: Photos That Restored Our Faith in Humanity

Allison Keene

We all could use this.

Coverage of the Tragic School Shooting

Jason English

Reuters/Landov Our sister site The Week has live updates on the massacre in Newtown, Connecticut. We'll be back over the weekend. I'm heading home early to hug my

5 Things You Didn't Know About "The 12 Days of Christmas"

The Week

by Scott Meslow With only 12 days left 'til Christmas, we're in the heart of caroling season — and few songs would seem more appropriate than "The Twelve Days of Christmas."

What's Your Favorite Pet Name Ever?

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.

Tear Out This Line: How Reagan’s Most Famous Words Almost Got Silenced

Matt Soniak

Wikimedia Commons “Behind me stands a wall that encircles the free sectors of this city, part of a vast system of barriers that divides the entire continent of Europe.” It was June 1987.

Miss Cellania’s Top 20 Weird News Stories of 2012

Miss Cellania

One of the ways we celebrate the end of the work week here at mental_floss is to round up the oddest news stories for The Weird Week in Review.

What Does SOS Stand For?

Matt Soniak

A lot of people think that the distress signal is an abbreviation for “save our souls” or “save our ship.” But in reality, "save our souls" and "save our ship" are backronyms, and

Why Does Santa Give Coal to Bad Kids?

Matt Soniak

Obviously, because they’ve been naughty, and not nice.

CERN Students Make Zombie Film ... At CERN

Erin McCarthy

Some of the students working at CERN in 2010 had at least one interesting extracurricular activity: Filming a zombie movie around the facility.

Brain Game: Sun, Rock, Spin

Please say hello to my friend Darrin, whose likes and dislikes will help you solve today's mentalfloss.com Brain Game Free-for-all Friday challenge.

Morning Cup of Links: No Time to Explain

Miss Cellania

How To Make An Awesome Family Christmas Card. With examples of funny, bizarre, and tragic cards that will be passed around for eternity. * Disaster Tourism at the Chernobyl Nuclear Accident Site.

The Late Movies - Guess The Theme 79

Mark Arminio

It's Thursday, it's late, it's time once again for the game that's sweeping the nation: GUESS THE THEME! All the clips below have something in common.

Why Did Humans Start Eating Cheese in the First Place?

The Week

By Chris

12 Letters That Didn't Make the Alphabet

M Asher Cantrell

We tossed aside quite a few letters as our language grew.