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Earth ScienceEarth's Atmosphere
Earth's atmosphere contains many components that can be measured in different ways. This module describes...
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Scientists and ResearchFrom Stable Chromosomes to Jumping Genes
This module profiles the groundbreaking research of biologist Barbara McClintock in the field of genetics....
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Scientists and ResearchPercy Lavon Julian
The module traces the life and career of organic chemist Percy Julian, who developed a...
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