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THE KNOWLEDGE FEED

How Do Smoke Alarms Work?

Matt Soniak

The smoke alarms in my apartment building are both ridiculously sensitive and ridiculously loud.

Brain Game: Your Goal

The National Hockey League is finally ready for action after an extended strike lockout, so here's a related mentalfloss.com Brain Game Tuesday Test Time challenge.

Morning Cup of Links: X-ray Ride

Miss Cellania

Watch the first-ever footage of the legendary giant squid in its natural habitat. The 26-foot-long cephalopod was recorded by a team of scientists in a submarine deep under the north Pacific Ocean.

5 Questions: Photography Necessities

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4 Times Trash Collectors Saved the Day

Jill Harness

From junk haulers to park workers to dump truck drivers, we owe a lot to those who keep our homes, parks, and streets clean—especially when they go out of their way to help people who have lost someth

Check Out Video of a Spectacular Solar Eruption

Erin McCarthy

On December 31, NASA's Solar Dynamics Observatory (SDO) satellite captured this stunning solar eruption, which occurred over the course of four hours.

The Missing Links: Getting on The Price Is Right

Colin Patrick

Come On Down Here’s how to get on The Price Is Right. * Something You May Actually Find in Area 51 Who knows if there are alien corpses or a wrecked UFO hidden in Area 51?

How Your Cup's Color Changes the Taste of Your Drink

The Week

By Jessica

Gorilla Expressions Could Point to the Origins of Human Laughter

Jill Harness

Next time you smile politely at a stranger, think of a gorilla baring his big pointy fangs while looking like he's just heard the best joke of his life.

Richard Feynman's "Ode to the Flower"

Chris Higgins

In 1981, physicist Richard Feynman was interviewed by the BBC. He told the story of his disagreement with an artist about who can better appreciate the beauty of a flower: artists or scientists.

Why Does Popcorn Pop?

Matt Soniak

First off, popcorn isn’t just any old corn. It’s a cultivated strain of flint corn known as zea mays everta.

Brain Game: Math Square #152

Today's Monday Math Square is the first one of the New Year for the mentalfloss.com Brain Game.

Morning Cup of Links: Discovering Birthday Cake

Miss Cellania

Evan began a lifetime of giving when he was seven years old and saved his allowance to donate to a cat shelter. That brought him more joy than all the candy his money could have bought.

5 Questions: What? This Old "Rag"?

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Inside the Internet Archive

Chris Higgins

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