Death & Rebirth

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, they can however still die from means other than the effects of aging. Many cultures and religions have a concept of an afterlife. The study of death is known as thanatology.