THE KNOWLEDGE FEED

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Vitamin D and the Brain

Meghan Holohan

During the Industrial Revolution, as more children started growing up in cities, physicians noticed a new disease, which weakened children's bones so they were no stronger than cartilage.

Why Do Coins Make Your Hands Smell Funny?

Matt Soniak

A lot of people assume that it's just the way that coins smell, and the odor is rubbing off on their hands, but you're not smelling the metal so much as you're smelling yourself.

The Number of the Day: 6.6 Million

Colin Patrick

During the most recent television season, Judge Judy averaged 6.6 million viewers per day, making her the top rated daytime show on television.

Go Mad Men Yourself

Jill Harness

Ever wonder what a cartoon version of yourself would look like decked out in 60's garb a la Mad Men?

I Suppose a Room With a Balcony is out of the Question

Colin Patrick

Even in 2010, the idea of a fully-functional underwater community seems like a super futuristic and ridiculously impossible sci-fi dream.

8 People With "Real" Superpowers

David K. Israel

We all dream of having some superpower to help navigate life. For instance, I've always wanted to be able to read peoples' minds.

Brain Game: Math Square #33

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. One of these numbers is already provided for you.

Morning Cup of Links: Bovine Choreography

Miss Cellania

Sperm is so useful that the gene responsible for it hasn't changed in 600 million years.

Weekend Links: Transformer Owl

Allison Keene

I wish I could remember these amazing uses for ordinary household items before I chuck out some of them out!

Last Week's Most Popular Stories

Jason English

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

What Should I Ask Scott Thompson?

Jill Harness

About a week ago I asked you all what I should cover at Comic Con.

Lunchtime Quiz Leftovers

Jason English

Weekend Links: The Vuvuzela Sound Game

Allison Keene

In honor of the passing of Yankee's owner George Steinbrenner, Ranker.com has served up 9 of the greatest, funniest and strangest moments of Steinbrenner's character (voiced by Larry David)

The Late Movies: Orchestras Go Pop

Miss Cellania

I love when classical musicians play pop songs.

The Quick 10: 10 Caulbearers

Stacy Conradt

Have you heard of the old belief that babies who are born in the caul (the amniotic sac) will grow up to be super-geniuses or otherwise destined for greatness?

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