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Just before bed the other night, we saw lights and heard some sounds coming from the Wonderopolis barn. When we investigated , we were quite surprised by what we saw and heard:

Cow: OK, everyone, stay in your line and, when the music starts, just do what I do. Hit it DJ!

Horse: Is this when I press the "play" button on this machine?

Cow: Yes! Do it! *music starts* Now everyone put your right front out!

Chicken: I don't have hooves!

Duck: Me neither!

Cow: Grrr! Just do your best with whatever you've got!

Chicken: When do we flap our wings?

Duck: I've got wings!

Cow: This isn't the chicken dance! I told you already: we're line dancing. Oh, never mind! DJ, hit pause!

We felt bad for the poor cow. She was just trying to teach the other animals in the barn how to line dance. We had to get to bed, so we're not sure if she ever . Have you ever tried line dancing?

Line dancing is exactly what it sounds like: a dance in which the dancers stand side-by-side in one or more lines as they a of dance moves in . Line dances usually involve moves that follow a .

Many people love line dancing because the dance moves are easy to and they don't need to coordinate moves with a . They just have to stand in a line and move in with their fellow dancers.

Each line dance consists of a number of "walls." A wall refers to the the dancers face at any given time (front, back, left, or right) as they dance through a of steps that will be . Since the steps tend to repeat frequently , dancers can easily catch up if they get lost.

Line dancing is often associated with country music. Modern country line dancing as we know it today got its start in Texas in the 1970s. It really became popular in 1992 with the release of Billy Ray Cyrus' hit song "Achy Breaky Heart."

Line dancing's roots actually go back much deeper, though. Some experts believe variations of line dancing have existed for over 2,000 years. Historians have found evidence of types of line dances that date to the ancient Egyptians, Native Americans, and Irish and German folk dance traditions.

Today, people enjoy line dancing to many forms of music beyond country. Pop, disco, techno, rhythm and blues, and hip-hop all have line dances to go with them.

No matter what type of music you choose to dance to, line dancing can be a great workout. Depending upon your age and fitness level, you can expect to burn between 300-800 calories per hour line dancing!

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Just before bed the other night, we saw lights and heard some sounds coming from the Wonderopolis barn. When we investigated , we were quite surprised by what we saw and heard: Cow: OK, everyone, stay in your line and, when the music starts, just do what I do.

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Today's Wonder of the Day was inspired by Alex. Alex Wonders, " What is a Flash Mob " Thanks for WONDERing with us, Alex!

There you are, sitting in the food court at the mall. You're minding your own business, eating an ice cream cone with your friends. Suddenly, music begins to play and people begin to appear out of nowhere and start to dance. What's going on? It's a !

A is defined by Webster's New Millennium Dictionary of English as "a group of people who organize on the Internet and then quickly in a public place, do something , and ." mobs got their start on June 3, 2003.

On that day, more than 130 people showed up in the ninth floor rug department of Macy's department store in New York City. When asked what they were doing, the people told salespeople they were shopping for a rug as a group!

The idea for the came from Bill Wasik, the senior of Harper's Magazine. Why did he start these crazy gatherings? Because he could! mobs were invented as a fun social experiment meant to encourage spontaneity and large groups of people to take over public areas temporarily just to show it could be done.

mobs quickly became popular, particularly amongst young people. Videos of mobs went on YouTube. Other social outlets, such as Facebook and Twitter, allowed mobs to be organized between friends and acquaintances and then shared with non- participants after the event occurred.

The of a is a large group of people suddenly assembling in a public place to perform an unusual act for a brief period of time before dispersing quickly as if nothing had happened. Some mobs are meant to entertain, while others are purely for expression. Still other mobs are purely for the enjoyment of the participants , as they watch the reactions of those around them.

Today, mobs are still popular in many cities around the world. College are also often popular spots for mobs. Although they're not as popular as they once were, mobs will continue to live on as long as there are large groups of people willing to take part in short, acts of pure silliness!

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Today's Wonder of the Day was inspired by Alex. Alex Wonders, " What is a Flash Mob " Thanks for WONDERing with us, Alex! There you are, sitting in the food court at the mall. You're minding your own business, eating an ice cream cone with your friends.