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- Zoology is the branch of biology that relates to the animal kingdom. The history of zoology traces the study of the animal kingdom from ancient to modern times.
- Ecology is the scientific study of the relations that living organisms. The word "ecology" was coined in 1866 by the German scientist Ernst Haeckel.
- Biology is a natural science concerned with the study of life and living organisms. It is a vast subject containing many subdivisions, topics and disciplines.
- Botany is a branch of biology that involves the scientific study of plant life. Today botanists study over 550,000 species of living organisms.
- Entomology is the scientific study of insects. At some 1.3 million described species, insects account for more than two-thirds of all known organisms.
- Chemistry is the science of matter, especially its chemical reactions. Chemistry is sometimes called "the central science" because it connects physics with other natural sciences such as geology and biology.
- Ornithology is a branch of zoology that concerns the study of birds. A wide range of tools and techniques are used in ornithology and innovations are constantly made.
- Optics is the branch of physics which involves the behavior and properties of light. Optics began with the development of lenses by the ancient Egyptians and Mesopotamians.
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