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Brain Game: Math Square #135

Today's mentalfloss.com Brain Game Monday Math Square challenge follows: Place the digits 1 through 9 in the white blanks so that the mathematical equations work both across and down.

Morning Cup of Links: Spider-Man at 50

Miss Cellania

Tropical storm Isaac is scheduled to hit Louisiana on the seventh anniversary of Katrina.

5 Questions: "Prima" Facie

Pass rate:75 %
Backwards navigation:Forbidden

The 1927 U.S. Plan to Invade Canada

Dan Lewis

While the United States and Canada are friendly neighbors, things can change. And in 1927, the U.S. planned for just such a scenario.

Introducing the Split Decision App for iPhone and Android

Mangesh & Jason

We spent much of 2010 developing Split Decision, our party/trivia game of improbable pairings.

7 Superpowers Available to Scientologists

Kathy Benjamin

Lafayette Ronald Hubbard identified 57 areas that people who reached the higher levels of Scientology would be able to control.

World War I Centennial: The Balkans Spin Out of Control

Erik Sass

Installment #33: By the end of August 1912 the situation in the Ottoman Empire was catastrophic, as ethnic conflict in the Balkans spiraled out of control, giving the Balkan League – a loose alliance

Weekend Links: Visualizing the Invisible

Allison Keene

A very long but essential read by the fantastic Atul Gawande for the New Yorker: Can Hospital Chains Improve the Medical Industry? (You'll actually learn a lot about the Cheesecake Factory, too.

"Peter and the Wolf," 1946

Chris Higgins

Remember that animated, professionally narrated version of Peter and the Wolf you saw as a kid?

Last Week's Most Popular Stories

Jason English

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

Neil Armstrong's Giant Leap

Chris Higgins

Neil Armstrong -- astronaut, engineer, professor, Navy pilot, and first man on the moon -- has died at the age of 82. He is best known for the words he spoke just after he set foot on the moon.

Wander Through Kennedy Space Center Using Google Street View

Chris Higgins

Google Street View is handy for finding places you're driving to -- but Google has been putting together a series of special "Street View" tours of places that aren't out on the st

Weekend Links: Alan Rickman Brews The Most Dramatic Tea In History

Allison Keene

Well this is just so many different kinds of fantastic I don't know where to begin: Alan Rickman makes tea in EXTREME slow motion. ? * From Tiny to Tinier: One GIF Zooms in on Bacterial Life.

Why Are Dalmatians Linked to Firefighting?

Kara Kovalchik

Sure, his coloring makes him look good against a red background, but it turns out that in the early days of firefighting, the Dalmatian served an important

The Late Movies: Disney Confessions

Miss Cellania

Adande Thorne, also known as Swoozie, posted an animated video of his adventures as a Disney theme park cast member. It was so successful that he now has a career as a video blogger and animator.