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Test your knowledge of Helium

Trapped within a subterranean expanse of porous rock near Amarillo, Tex., is the world's largest supply of helium, the Federal Helium Reserve.

The U.S. government is on track to sell the last of this stockpile within five years and let the private sector control the market.

But some scientists fear that within a few decades, there may not be any helium to control. In fact, they say we're close to running out of the second most common element in the universe. (In our solar system, most helium is inside the sun.) Read the full story.

By Abha Bhattarai  |  October 11, 2010; 5:40 PM ET  | Category:  National Save & Share:  Send E-mail   Facebook   Twitter   Digg   Yahoo Buzz   Del.icio.us   StumbleUpon   Technorati  
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Question 9 is bogus. Being lighter than air is NOT the same as defying gravity.

Posted by: misere | October 12, 2010 12:48 PM

Perhaps Question 9 should really say something like, "True or False: SUPERFLUID helium does not defy gravity."

http://www.scientificamerican.com/article.cfm?id=superfluid-can-climb-walls

Posted by: elkaytee | October 12, 2010 3:15 PM

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