Biological immortality — or, more accurately, never growing old — has been studied by scientists who think it could be achieved with advanced genetic engineering.
But the technology to live forever will be incredibly expensive once it is available.
Transhumanist and futurist Dr Ian Pearson predicted “the rich and famous” will be getting the treatment by the 2050s — similar to how the stars have access to plastic surgery today.
“There are quite a lot of people interested in living forever,” he told Daily Express.
“No one wants to live forever at 95 years old, but if you could rejuvenate the body to 29 or 30, you might want to do that.”
Dr Pearson said celebrities and millionaires like the Kardashians would have first dibs on the technology for eternal youth — with people on normal incomes having to grow old and die naturally.
It is believed humans grow old due to an inefficiency in the way our cells replicate.
The protective “junk code” at the end of DNA eventually runs out, leaving older people more vulnerable to cancer mutations.
The junk code is known as “telomeres” and the oldest animals on earth naturally have longer ones.
American lobsters can live for more than 100 years with no sign of ageing and have a telomere-lengething enzyme called telomerase in every cell.
But with constant breakthroughs in biology and the first ever genetically-modified babies born this year, many futurists believe the technology is within grasp this lifetime.
Another theory is that humans will have “electronic immortality” by fusing their consciousness to a robot.
“By 2060, people like you or I will be able to buy it, and by 2070 people in poor countries on modest incomes will be able to buy it”, Dr Pearson told the Sun.
“Everyone will have a chance to have immortality, a sort of electronic immortality.
“After 10, 15, 20 years, the price comes down to hundreds of pounds, rather than millions. It could be provided as part of the NHS.
“You might be able to buy premium offerings on a private subscription, or you might get a basic presence on a network and be allowed to use an android body.”
But with an exploding population, other futurists worry about the ethics of making humanity immortal.
Though others pointed out if you could stay young forever, humans might put-off having their first child until they were 200 years old or more.