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Scientists and Research
Percy Lavon Julian
The module traces the life and career of organic chemist Percy Julian, who developed a...
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Math in Science
Scientific Notation
The blue whale weighs approximately 190,000 kilograms, while a plankton weighs just 0.5 milligrams—a difference...
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Chemistry
Water
Water is a truly unusual and important substance. The unique chemical properties of water that...
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