THE KNOWLEDGE FEED

The early recordings made by Motown singers were produced in a studio in a converted house on West Grand Boulevard in Detroit, across from the Henry Ford Hospital. Echo effects were produced by having the singers perform under a large hole cut in the ceil

The early recordings made by Motown singers were produced in a studio in a converted house on West Grand Boulevard in Detroit, across from the Henry Ford Hospital. Echo effects were produced by having the singers perform under a large hole cut in the ceiling, leading to a drywalled attic "echo chamber."

The Royal Babies Quiz

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Yesterday, it was announced that Catherine, Duchess of Cambridge, is pregnant with her first child with Prince William, Duke of Cambridge. Celebrate the occasion with this quiz on royal pregnancies and the crowned offspring they produce.

5 Questions: It Begins at Home

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5 Questions: Once in a Lifetime

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Divorce is legal in every nation in the world except in the Philippines and in Vatican City.

Divorce is legal in every nation in the world except in the Philippines and in Vatican City.

5 Questions: Name's a City

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5 Questions: Tube Chefs

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Sideways Stories from Wayside School

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When you were a kid, did you wish your teacher was as wacky as mrs. Jewls? Or that your school was as zany as Wayside? Here's a quiz for young (at heart) readers who loved the Louis Sachar series.

5 Questions: Happy Birthday Les Paul

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According to a 2012 <em>New York Times</em> story, 1% of Americans still get on the Internet with an AOL dial-up connection.

According to a 2012 New York Times story, 1% of Americans still get on the Internet with an AOL dial-up connection.

Brain Game: Sharon, Marge, and Norah

Sandy Wood

5 Questions: Just Plain Jane

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5 Questions: Isn't It Romantic?

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Name The Top 10 Christmas Day Releases Of All Time

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This year, moviegoers will have plenty of Christmas Day options: Parental Guidance, Django Unchained and Les Miserables all open on the 25th. Can you name the all-time top Christmas Day releases, according to Box Office Mojo? Remember, we're looking for the movies released on Christmas Day that also grossed the most that day.

Here's a hint: the oldest film on the list was released in 1998, while the most recent one was in 2009.

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