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14 Gorgeous Kelv-Helmz Cloud Formations

David K. Israel

Kelv-Helmz is short for the Kelvin–Helmholtz instability (after Lord Kelvin and Hermann von Helmholtz). These tremendous cloud formations are the result of shearing winds up at the cloud level.

Brain Game: That's a Lot of Popcorn

See if you can correctly answer today's mentalfloss.com Brain Game Tuesday Test Time challenge.

Morning Cup of Links: Gymnastic Football

Miss Cellania

2011 In Pop Music, According To DJ Earworm. His annual mashup of pop hits is this year titled “World Go Boom.” * 2011's Top UFO Sightings And Paranormal News.

Wrapper's Delight: The Legendary Collaboration of Christo and Jeanne-Claude

Leah Welborn

© Bettmann/CORBIS On November 18, 2009, one of the most important artistic partnerships of the century ended when Jeanne-Claude, of Christo and Jeanne-Claude, passed away.

Mutated Cat Rescues Animal Shelter

Jill Harness

Daniel is quite an extraordinary kitty.

Brain Game: Math Square #103

Please enjoy today's mentalfloss.com Brain Game, entry #103 in the Monday Math Square series.

Trololo Man is BACK!

David K. Israel

Merry Christmas to all from the _floss and Eduard Khil, who, even at the age of 77, still has

5 Classic Christmas Songs (and Other Songs Those Artists Recorded)

Kara Kovalchik

"Rockin' Around the Christmas Tree" has been on repeat in shopping malls since Thanksgiving, but that doesn't mean it's the only popular song Brenda Lee ever recorded.

Making George Washington's Special Eggnog

Jason English

Yes, it's Christmas Eve. But it's also National Eggnog Day! We recently made George Washington's eggnog in our New York office.

The Late Movies: Christmas with Darth Vader

Miss Cellania

Darth Vader's Christmas A Storm Trooper has to think fast when he forgets to get Darth a Christmas gift! * Darth Hates Christmas Despite a cute gift and caroling Storm Troopers, Darth j

Three More Coaches Who Lied About Their History

Jason Plautz

By now, you’ve probably heard the story of Yale football coach Tom Williams, who resigned this week for lying on his resume.

Why Is Santa So Fat?

Matt Soniak

Lisa F. Young / Shutterstock.com Poor Santa. He's a big guy and everyone knows it.

What Really Is the Most Wonderful Time of the Year?

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.

6 Holiday Pics Found on reddit Recently

David K. Israel

In case you've been living in a cave the last few years, it's worth making a daily trip to the sub-reddit, pics.

Forgot Someone? Great Last-Minute Gift Ideas

Mangesh & Jason

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