Brain Game: Hoof on Roof

By changing one letter at a time to form different English words, and leaving all other letters in their original positions, convert REIN into DEER in the fewest steps possible.

Morning Cup of Links: Double Dreamhands!

Miss Cellania

The Most Heroic Animals of 2010. Read stories of dogs, cats, horses, dolphins, rabbits, and a cow that might leave you a little verklempt.

In the Market for Monster Supplies?

Jill Harness

If you've ever been to 826 Valencia (aka The Pirate Store) in San Francisco or The Brooklyn Superhero Supply Store, then you're already familiar with the concept behind the Hoxton Street Mon

The Late Movies: Awesome Videos for Charity

Ransom Riggs

In case you missed it, last weekend's Project for Awesome was an incredible and sort of unprecedented outpouring of activism on behalf of (what seemed like) the entire YouTube community.

The Quick 10: Merriam-Webster's Top Ten Words of 2010

Stacy Conradt

As a self-proclaimed word nerd, I love when the word of the year is announced.

Who is ready to win a NEW CAR tomorrow?

David K. Israel

We're less than 24 hours away now! Tomorrow morning, at precisely 10:30am, we will announce your four starting locations right here on this blog (also on the following Twitter accounts: @menta

Five Whiskeys Dad Will Love

Ransom Riggs

Tis the season, and if you're like a lot of gift-buyers out there, Dad is both the easiest and the hardest family member to shop for -- sure, you can always get him golf clubs or bottles of fancy

DanKam: Colorblindness "Corrective Lenses" for Your Smartphone

Chris Higgins

I'm not colorblind, I'm just "green-weak." At least that's what I tell everyone.

England's Ugliest Dog Finds a Home for the Holidays

Jill Harness

Everyone says they want to be home for the holidays, but for homeless animals, this wish is often an impossible dream.

Brain Game: Math Square #55

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 (the red square).

Morning Cup of Links: Solstice Eclipse Alert

Miss Cellania

The only total lunar eclipse of 2010 will be visible from all of North America on Monday night/Tuesday morning.

Weekend Links: The Ghost in Your Genes

Allison Keene

From Shilo, there is nothing to fear except fear itself … unless you lack the ability to fear!

Last Week's Most Popular Stories

Jason English

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

We'll be the ones with too many prizes in our hands!

Mangesh & Jason

Don't forget that the most important holiday (trivia) party of the season, the mental_floss TRIVIA SHOW, is tonight!!!

White House Celebrity Santas of the 1980s

Ethan Trex

When it gets this close to Christmas, you can barely turn around without spying someone in a Santa suit.