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THE KNOWLEDGE FEED

Documentary: The London Underground Map

Chris Higgins

In 1931, Harry Beck drew a diagram of the London Underground (aka the Tube), making visual sense of an extremely complex system.

Anyone Can Play Guitar - Lesson No. 4

David K. Israel

Welcome back. Today we'll be learning how to play the verse to "It's Only Rock'n'Roll" by The Rolling Stones.

History of the World: The Truth About Chastity Belts

Stacy Conradt

We all know the origins of the chastity belt, right?

The Rickroll Gets Political

Ransom Riggs

The internet meme known as Rickrolling has finally come of age -- and spawned a sequel. At more than 6 months old -- an eternity in internet years -- it's proven more durable than most memes.

Blender Defender

Miss Cellania

Here's a gadget you can't buy, but you can build. It paid off twice for Brian, first by solving a household problem, then by entertaining us all on the

Brain Game: Why Wyoming?

Today's Brain Game: WYOMING begins with two consonants (unless you classify "Y" as a vowel). What other two U.S.

'Yes, I Lived Under a Rock' Winners

Terri Dann

Oh, and how the floodgates of crippling shame opened. It's a good thing that I was in the office alone when I read all the entries.

Morning Cup of Links: Controlling Hurricanes

Miss Cellania

A million residents of the Chelyabinsk Province in Russia found out what happens when radioactive waste is not properly stored or cooled, between 1948 and 1990 -not that they were told what was happen

12 Unusual College Football Trophies

Ethan Trex

With the college football season in full swing, several teams have a reasonable shot at the two national championship trophies.

Drawing Lives Through Magic: Keith Haring

Andréa Fernandes

Today's post comes at the request of two readers, zach and SpaceMonkeyX, who said his wife "would be giddy" if "Feel Art Again" featured Keith Haring (1958-1990).

A Beginner's Guide to the Iron Dog

Scott Allen

What's the difference between a pit bull and a snowmachine racer? A lot more than chapstick.

Lunchtime Quiz Leftovers

Jason English

The Weekend Links

Allison Keene

From our friends at the Daily Tube, the most amazing prank I've ever seen.

Caption Contest No. 12

David K. Israel

We're back with another cartoon by regular _floss reader, the multi-talented Robert Bonotto. To repeat the rules, the idea here is quite simple: Your job is to come up with a gag.

5 Innovative Ways to Encourage Safer Sex

Meghan Holohan

Most people know that condoms help prevent the spread of HIV and sexually transmitted infections (STI). But in many parts of the world, condoms aren't very popular.

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