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Earth ScienceEarth Structure
Earth's interior structure is composed of layers that vary by composition and behavior. Using principles...
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Scientists and ResearchFrance Anne-Dominic Córdova
This module profiles the career of astrophysicist France Córdova, director of the National Science Foundation....
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Scientists and ResearchEllen Ochoa
Although she was rejected by the space program initially, Ellen Ochoa went on to become...
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