Prolonging life/ rejuvenation. I don´t think its coming anytime soon. But I think it is coming.
I read about some recent achievements in that area.
Some scientists prolonged the live of a rat for several years.
And another article I read mentioned a possible cause of ageing being the information stored in your cells getting to much and they not being able to retain enough new one. And the proposed solution would be clearing out junk information.
No idea how real it is.
On the other hand I don´t really want this to come true. Since if de-aging becomes a relity. It will be even easier for the super rich to accumulate power and wealth