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Your assumption that humans somehow live longer than most other animals seems to be a misconception. You see, it is not only humans, but most large animals around our size, and larger, which live longer (for example, sea turtles live up to 200 years).
Maximum lifespan is the age at death for the longest-lived individual of a species. Moreover, because life expectancy is an average, a particular person may die many years before or many years after the expected survival. The term maximum life span has a quite different meaning and is more related to longevity.