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Marie Curie was a Polish scientist who did extensive work on radioactivity and radioactive materials along with her husband, Pierre.
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Marie Curie was a Polish scientist and atheist<ref>http://womenshistory.about.com/od/mariecurie/p/marie_curie.htm</ref> who did extensive work on radioactivity and radioactive materials along with her husband, Pierre.
    
She discovered two elements, previously unknown, both radioactive. One of them she named ''polonium'' in honor of her native Poland, the other ''radium.''
 
She discovered two elements, previously unknown, both radioactive. One of them she named ''polonium'' in honor of her native Poland, the other ''radium.''
    
The ''Curie,'' a unit of radioactivity, is named in her honor.
 
The ''Curie,'' a unit of radioactivity, is named in her honor.
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