Death

Death
Death is the end of life. It is the irreversible cessation of biological functions that sustain a living organism; however, the identification of the moment of death presents certain difficulties. Some organisms, such as the immortal jellyfish, are biologically immortal; nonetheless, they can still die from causes other than the effects of aging. Many cultures and religions have a concept of an afterlife. The study of death is known as thanatology.

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