blood
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Is Blood Ever Blue? Science Teachers Want to Know!
Posted by Greg Laden on April 5, 2008
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According to one of the leading experts on the human circulatory system, blood flowing through veins is blue.
Is Blood Ever Blue? Science Teachers Want to Know!
Posted by Greg Laden on February 11, 2008 Why ask the question, “Is blood ever blue?” According to one of the leading experts on the human circulatory system, blood flowing through veins is blue.
, which is now available for the 
