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Life Science
  ⇒ Science of living things
        · Botany
        · Zoology
        · Genetics

Physical Science
  ⇒ Science of matter and energy
        · Physics
        · Chemistry
        · Astronomy

Earth Science
  ⇒ Science of Earth - its physical features, origin, and composition
        · Geology
        · Paleontology
        · Oceanography