World's Tallest Building

Many of you already know that Burj Khalifa is the world TALLEST tower that world has ever seen.  It is a stunning work of art integrated with sophisticated engineering. Today, I would like to share some facts of Burj Khalifa, which might blow your mind! Let’s take a look some of the facts: 

Where is it?

Dubai, United Arab Emirates

When its construction started and completed?

Construction started in January, 2004 and completed in January 2010.

How much it cost to build it?

1.5 Billion Dollars*

Who’s the Burj Khalifa’s Architect?

Adrian Smith

What is the total height?

Over 828 meters or 2717 Feet.

How many floors?

It has 163 floors

How many workers are needed to clean its window?

It takes a team of 36 cleaners and spend 4 months to clean Burj Khalifa’s over 24347 windows!^{^} 

Other Facts¹: 

• Tallest free-standing structure in the world
• Highest number of stories in the world
• Highest occupied floor in the world
• Highest outdoor observation deck in the world
• Elevator with the longest travel distance in the world
• Tallest service elevator in the world

Also check out this coolest picture! I love it. It shows human fascination for building magnificent structure started long time ago. Think about the Pyramids in Egypt!

Source: 

*Stanglin, Doglas. "Dubai Opens World's Tallest Building." USA Today. Gannett, 01 Jan. 2010. Web. 29 Oct. 2013. 

^ Malkin, Bonnie, January, 5th, 2010, “Burj Khalifa: window cleaners to spend months on world’s tallest building”

1. http://www.burjkhalifa.ae/en/

Who Developed Area Codes in North America?

The area codes actually amazing! Never knew who develop this system until today. The area codes system was developed by AT&T and Bell Laboratories in 1940s and becomes effective in 1947 and people started using it in 1950's*. it was called North American Numbering Plan (NANP). 

In 1947, United States and provinces that had area code we assigned three digit codes with 0 as middle number, such as 305 for Florida, 205 for Alabama, 303 for Colorado etc*. 
The first and 3rd digits were decided according to population density in the city or region*. The most populated arrears getting the lowest numbers. For example, New York City area, was assigned 212, while the surrounding suburbs were 315, 518, and 914 and so on. 

Related Video 

Source: http://www.area-codes.com/area-code-history.asp

Who Discovered Blood Types?

Blood transfusion definitely saves life lots of life. However, many patients from all around the world died until 1901.

Who: Austrian physician and Scientist, Karl Landsteiner discover human blood group! He published a paper dealing his discovery of the three main human blood groups: A, B, and C, which he later changes to O. His contributions spanned many areas of immunology, bacteriology and pathology over a prolific 40 year career.

First Successful Blood Transfusions..

In 1907 the first successful transfusions were achieved by Dr. Reuben Ottenberg of Mt. Sinai Hospital, New York, guided by Landsteiner's work.

Karl Landsteiner's work made it possible to determine blood groups and thus paved the way for blood transfusions to be carried out safely. For this discovery he was awarded the Nobel Prize in Physiology or Medicine in 1930*.

 

Related Video

Source:  Gates, Sara. "World Happiness Report 2013 Ranks Happiest Countries Around Globe."The Huffington Post. TheHuffingtonPost.com, 09 Sept. 2013. Web. 15 Oct. 2013* Blood Groups, Blood Typing and Blood Transfusions." Blood Groups, Blood Typing and Blood Transfusions. N.p., n.d. Web. 15 Oct. 2013

Happiest Countries in the world by 2013

Guess which countries are the happiest countries in the world by 2013?  According to 156-nation survey published by the United Nations Sustainable Development Solutions Network, Denmark, Norway and Switzerland are the happiest countries in the world!

Among North American Countries, Canada ranks in 6^th place while Mexico 16^th and U.S 17^th! 

Source: Gates, Sara. "World Happiness Report 2013 Ranks Happiest Countries Around Globe." The Huffington Post. TheHuffingtonPost.com, 09 Sept. 2013. Web. 15 Oct. 2013.