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• In rocketry, a stage is one of several independent rockets used to reduce the need for fuel.
• Referring to rivers, the stage is the height of the water on a gauge. Flood stage occurs when it begins to overflow the surrounding areas.
• In theatre, a stage is a platform upon which performers act. Stage is often used as a more general term to refer to anything relating to the creation of performance art.
• In medicine, the stage of a tumor is used to assess the prognosis of a cancer.
• In paleontologyPaleontology (palaeontology is the British spelling) is the study of the developing history of life on earth, of ancient plants and animals based on the fossil record, evidence of their existence preserved in rocks. This includes the study of body fossils, a faunal stageFaunal stages are a subdivision of geologic time used primarily by paleontologists who study fossils rather than by geologists who study rock formations. Typically, a faunal stage will consist of a series of rocks that contain similar fossils. There will is a period of time covering a few million years.