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ChemistryThe Mole and Atomic Mass
The mole is an important concept for talking about a very large number of things...
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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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PhysicsGravity
Isaac Newton's description of gravity was not the first explanation of this phenomenon, nor was...
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