SCIENCE

(1) a branch of knowledge or study dealing with a body of facts systematically arranged and showing the operation of general laws; (2) systematic knowledge of the physical or material world gained through obervation and experimentation

North American Porcupine
Erethizon dorsatum

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BIOGRAPHY

ASTRONOMY BOTANY CHEMISTRY GEOLOGY HUMAN ANATOMY

MATHEMATICS MICROBIOLOGY NATURAL HISTORY PHYSICS PHYSIOLOGY ZOOLOGY

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