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“The brain is like a muscle. When it is in use we feel very good. Understanding is joyous.”
 
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Tags: Brain | Feel | Good | Joyous | Muscle | Understanding | Use | Very
 
Author details
 
 
Carl Sagan
 
Nationality:   American
 
Date of Birth:   Nov 9, 1934
 
Date of Death:   Dec 20,  1996
 
Profession:   Scientist
 
 
 
 
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