Biological Immortality is virtually indistinguishable from afterlife, but philosophically speaking, they are not identical. It refers to a stable or decreasing rate of mortality from senescence, thus decoupling it from chronological age. Immortality has been one of mankind’s major concerns, and even though it has been traditionally mainly confined to religious traditions. Biological immortality in humans is an inevitable consequence of natural evolution. It living being can still die from means other than senescence, such as through injury or disease.