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THE KNOWLEDGE FEED

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What is a Polar Vortex?

Erin McCarthy

If you’ve turned on the news or stepped outside lately, you’re familiar with the polar vortex. But what exactly is happening here?

13 TV Shows That Changed Titles

Rudie Obias

When these shows got retooled, their names got changed, too.

Name the 50 Most Mentioned Harry Potter Characters (Without Missing One)

7 Must-Have Items from Rue McClanahan’s Estate Sale

Kara Kovalchik

Actress Rue McClanahan, who passed away in 2010, wanted her memorabilia to go to her fans, with proceeds from the sale going to her favorite charities.

The Missing Links: Weird Old Inventions

Colin Patrick

25 Stunning Photos of China's Ice and Snow Festival

Erik van Rheenen

A little inspiration for your next snowman-building adventure.

Strange States: Indiana's Big Ball of Paint

Rob Lammle

9 Unusual Things That Astronauts Brought to Space

DeAnna Kerley

Over the span of human spaceflight, some pretty weird things have made the trip. Here are a few of them.

7 Films That Were Incredibly Difficult to Make

Most movies are easy to make. Then there are these monuments to the determination of their directors, casts, and crews.

The Lion Whisperer

Chris Higgins

6 CES Technologies Ahead of Their Time

Rob Lammle

These items weren't a hit at the time, but later became a part of our daily lives.

What Causes Audio Feedback?

Sean Hutchinson

We’ve all heard it before: A deafening squeal coming from the speakers at a concert or event that causes everyone in the audience to plug their fingers in their ears and shout, “Make it stop!”

The Nicknames of All 32 World Cup 2014 Teams

Erik van Rheenen

The 2014 FIFA World Cup in Brazil is six months out, but there's no better time to pick a side to root for come summer.

ToyTalk: How to Create Space Sounds from Everyday Life

DeAnna Kerley

Weekend Links: 76,897 Kinds of Movies

Roma Panganiban

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