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SmithsonianScience Education Center
HOW DO LIVING THINGS STAY SAFE AND GROW?CowsSmithsonian Science for the Classroom™© Smithsonian InstitutionCREDIT: Diane Kuhl/iStock/Getty Images Plus
SmithsonianScience Education Center
HOW DO LIVING THINGS STAY SAFE AND GROW?CowsSmithsonian Science for the Classroom™© Smithsonian InstitutionCREDIT: Diane Kuhl/iStock/Getty Images Plus