Extinction (disambiguation)

Extinction can refer to more than one thing:

• In biology, extinction is the disappearance of a species.\n*In geology, an extinct volcano is generally considered (by geologists) to be "inactive"; and thus, unlikely to erupt.\n*In astronomy, extinction is the gradual reddening and dimming of light as it passes through gas and dust (such as the interstellar medium in the Milky Way or the atmosphere of the Earth). \n*In the field of learning and memory, extinction is the process by which learned associations are actively forgotten. See classical conditioning.

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