Humans have questioned death, and have searched for immortality since they first became conscious of the finiteness of life. Many modern humans are now confident (or at least hopeful) that it may be possible to achieve immortality, perhaps by using technological advances. This is a myth. It is against the laws of physics (think of entropy) for anyone to become immortal, so it will not happen.
Let me clarify what I mean. The term ‘immortal’ literally means someone who never dies, i.e. lives forever. But ‘forever’ means really forever, more than 50 trillion years, until the end of time. In the foreseeable future (the future which is relevant to us alive today) this is just plain nonsense. If the term is nonsense, then it should not be used. Better terms may be ‘longevity’, or ‘extreme lifespan’ which means to live for many years, without stipulating a number. Extreme longevity, or extreme life extension is not immortality. One may be able to live for 1000 years, and then still die. Another suitable term could be ‘indefinite lifespan’ which is the absence of a sustained increase of mortality as a function of age (i.e. it is the absence of death due to aging). These terms denote something feasible, something that can be achieved with the use of near-term future technology.
Another legitimate term to use is ‘Human Biological Immortality’. This is a strict term used in biology to refer to the decrease of the rate of cellular mortality as a function of age. It is, in other words, similar to the term ‘indefinite lifespan’. Here the emphasis is on indefinite, and not on infinite.
I believe that certain humans will be able to live indefinitely (50 years, 500 years, no a priori limit) and that this will happen after a combination of natural evolutionary events (https://acrobat.com/#d=MAgyT1rkdwono-lQL6thBQ) enhanced and accelerated by science and technology (http://hplusmagazine.com/2011/03/04/indefinite-lifespans-a-n…bal-brain/). Death by aging will be abolished, and people will only die from accidents, illnesses etc. We will still be mortal.
Is it really necessary to stick to the exact meaning of the words? Yes, it is if we are to be taken seriously. To use terms like ‘eternal life’, ‘immortality, or ‘living forever’ decreases the scientific credibility of the anti-aging movement, has undertones of religious beliefs that have no basis in science, and disconnects both the general public and the funding bodies from the subject.
The point here is that any emerging technologies will only emerge if the public supports them, and if the researchers get funding. If supporters of these technologies appear too irrational, illogical or unreasonable, then they will damage the cause, and make it more difficult for others who, still visionary, have more achievable aims.