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What is the Theory of Evolution? How do chemical reactions occur? Why is the human eye most receptive to only three colors? Get ready to explore the fascinating world of science in this boxed set of six encyclopedias. Well-labelled diagrams, and an extensive glossary of difficult words come as happy bonuses in these informative books. Well-labeled imagesWill educate and entertain young learnersBuilds a robust vocabularyExcellent for gifting and schoolsChild-friendly information