Humans and all animals die in due course from old age. Some exceptions include the hydra, rockfish, turtles and whales, all documented to live 200 years or longer without showing signs of aging, and the biologically immortal jellyfish Turritopsis nutricula.
Intervening phenomena which commonly bring about death earlier include malnutrition, disease, or accidents resulting in terminal physical injury. In the animal kingdom, predation (being killed by another animal and eaten) is a cause of death for many species. Intentional human activity causing death includes suicide, homicide, and war. Roughly 150,000 people die each day across the globe.
Death in the natural world can also occur as an indirect result of human activity: an increasing cause of species depletion in recent times has been destruction of ecosystems as a consequence of the widening spread of industrial technology.
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