WHEN it comes, human immortality isn't going to come in a vacuum. It's going to be accompanied in advances in Physics, Biology, Optics, Computing technology, Nanotechnology, Information Technology, AI and HUNDREDS of other scientific disciplines from Acoustics to Zoology.
Some here say, it'll NEVER happen! (Never say NEVER!) I'm sure that's exactly what most said at the turn of the 20th Century when human life span was 45 yrs old. 90 yr lifespans will NEVER happen! WE'RE DOOOOOOOOOOMED!
20 yrs does seem to be sorta wishful thinking to me. But 50-100 years DOES seem to be realistic. We're learning to extend the lifespans of MANY lesser lifeforms, learning how genetics works and affects human longevity at a fundamental level. Fruitflies with doubled lifespans. Nematodes with doubled lifespans. Mice with doubled lifespans.
It's just a matter of time!
Just kind of wondering--if you were in the process of living forever, how would you know?
What would you do? Say, "fifty years down and a gazillion to go, and here's my new puppy."
Then ten years later say, "sixty years down and a gazillion to go, and my dog still won't fetch a stick."
Then ten years later say, "seventy years down and a gazillion to go, and my dog went to fetch a stick and where did he go I haven't seen him for ten years."