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The Number of the Day: 13

Will Treece

Tokyo Tower is based on the Eiffel Tower, but the designers of the sequel decided to make it 13 meters taller than the original.

The Late Movies: Siskel and Ebert Review the Worst Movies Ever

Ransom Riggs

Roger Ebert has been getting a lot of attention recently for being a fascinating and prolific Twitterer, and for continuing to review lots of movies despite having lost the ability to speak.

Join mental_floss at the Idea Festival!

Mangesh & Jason

This fall, our co-founder Will Pearson will be representing mental_floss at the Idea Festival in Louisville, which runs from September 29th through October 2nd.

The Quick 10: 10 U.S. Coins You Won't Find in Your Pockets

Stacy Conradt

The change pocket of my billfold is full of pennies. Just pennies. I pilfer dimes, quarters and nickels for the vending machines at work, or sometimes parking meters. But pennies? I never use them.

Party Like It's 1876! 12 Items From the Centennial Exposition

Scott Allen

The 1876 International Exhibition of Arts, Manufactures, and Products of the Soil and Mine, which was more commonly known as the Centennial Exposition, was held in Philadelphia in honor of the 100th a

Return of the Jedi - New Deleted Scene Released

Chris Higgins

Update: it appears that all YouTube versions of the clip have been removed, though there is a version available here.

5 Things I Learned on my Summer Vacation

David K. Israel

There's nothing like spending two weeks back east in the middle of a nasty heat wave to make you appreciate the remarkably balanced, dry weather we've had in Los Angeles all summer.

What Does Adrenaline Do?

Matt Soniak

Reader Noah wrote in with a question—"Why does the human body need

Brain Game: Math Square #37

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).

Something New to Worry About: Vampire Bats

Ransom Riggs

Well, if you live in the Amazonian regions of Peru, it's something to worry about.

Morning Cups of Links: Annoying Office Jargon

Colin Patrick

One diligent Twitter user is attempting to create a highly-summarized version of the Bible. * Get in the mood for football with this countdown of the funniest touchdown dances of all time. * If yo

The Number of the Day: 16,000

Jason English

Mountains beneath Antarctica's ice sheets rise 16,000 feet. Related Link: Vacation to Mars: Photos of Antarctica's Dry Valleys, by Ransom Riggs [Source: National Geographic Answer Book

Our Back-to-School Sale Ends Tonight!

Mangesh & Jason

Act now and you can get 15% off the great stuff in the mental_floss store—t-shirts, mugs, books, a Periodic Table Shower Curtain, and more.

Weekend Links: Don't Hassle the Hoff

Allison Keene

My friend Jessica found a great link to a video lampooning the current net neutrality / Google hubbub by asking the question, what if "The Net" had been made in 2010 instead of 1995?

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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