From the time they are born, immortals and "pre-immortals" cannot biologically have children.
Immortal physiology is different from normal human physiology because of the Quickening, which might be a powerful electromagnetic field. According to the series, Immortals suffer and die from wounds exactly the same way as ordinary humans do, however, they restore to a healthy state after dying.
Biological immortality is an absence of aging. Specifically it is the absence of a sustained increase in rate of mortality as a function of chronological age. A cell or organism that does not experience aging, or ceases to age at some point, is biologically immortal.
If you define it as living forever and being unkillable like in a comic book or movie, then, no, it is highly unlikely. However, if you define it in terms of showing no decline in survival characteristics, no increase in disease incidence, and no increase in mortality with advancing age, then yes.
Immortals may possess an arrested aging process, meaning they will not visibly age. When a being is born immortal, this generally means that they will stop aging once they reach maturity. Others simply age at a much slower rate than mortals.
To date, there's only one species that has been called 'biologically immortal': the jellyfish Turritopsis dohrnii. These small, transparent animals hang out in oceans around the world and can turn back time by reverting to an earlier stage of their life cycle.
These are natural changes that occur while aging. They cannot be stopped but it is possible to slow the rate of these processes. This can be done by changing one's lifestyle (diet, exercise, etc). The science of aging is not yet fully understood; therefore, it is difficult to determine an absolute limit of 200 years.
Normally, as time passes, our cells undergo changes: Our DNA mutates, cells stop dividing, and harmful junk—by-products of cellular activity—builds up. All these processes together cause us to age.
The idea of singularity is the moment AI exceeds beyond human control and rapidly transforms society. Predicting this timing is tricky, to say the least. But Kurzweil says one crucial step on the way to a potential 2045 singularity is the concept of immortality, possibly reached as soon as 2030.
"It's impossible for us because our bodies are super complex," Martínez said. Humans have stem cells that can repair and even regrow parts of the body, such as in the liver, but the human body is not made almost entirely of these cells, like hydra are.
In 7 years, humans might be able to live indefinitely, predicts Ray Kurzweil, a futurist with a track record of accurate predictions. He believes that with the technological advances and expansions, we're witnessing today in genetics, robotics, and nanotechnology; we'll soon have nanobots running through our veins.
Originally, Highlander: The Series was created to carry on directly from the events of the original 1986 film Highlander. The film had ended with Connor MacLeod becoming the last immortal in 1985, ending the Game and earning "The Prize".
Resurrection: While still potentially able to be killed, his body does not decay, remaining perfectly preserved and even still physically healing. As long as any major parts of his body like his torso or head are reattached, he will ultimately regenerate and revive.
As an immortal increases in power they will gain the ability to regrow fingers and limbs, they can always regrow vital organs.
Lifespan refers to the maximum number of years an individual can live, making lifespan unique to everyone. The longest recorded lifespan was Jeanne Calment who lived for 122 years and 5 months, making the maximum possible human lifespan 122 years and 5 months – that is, until someone outlives Calment.
Answer: everyone hopes to live forever. Anyone can't hope to live forever.
This has led scientists such as Jan Vijg at the Albert Einstein College of Medicine in New York to conclude that there is probably a biological limit on the maximum human lifespan, which he puts at about 115 years old.
The researchers forecast that by 2050 life expectancy for females will rise to 89.2-93.3 years and to 83.2-85.9 years for males. The U.S. Census Bureau and the Social Security Administration project life expectancy in 2050 of 83.4-85.3 years for females and 80.0-80.9 years for males.
Adam is the name given in Genesis 1-5 to the first human. Beyond its use as the name of the first man, adam is also used in the Bible as a pronoun, individually as "a human" and in a collective sense as "mankind".
We are constantly under attack from our environment, and our bodies accumulate damage over time. Damage affects the DNA, proteins and fats in our body which break down and weaken various components that we need to survive.
Regenerating flatworms
This apparently limitless regeneration also applies to aging and damaged tissue, allowing the worms to cheat death indefinitely, according to a study at the University of Nottingham.
2: Resilient.
Characters with this immortality are highly resilient towards physical attacks, but can't regenerate from it. For example, the character will be still alive if he's cleaved in half or split into pieces, but he can't paste himself back together. Severed limbs won't grow back, nor will destroyed organs.