Will eternal youth be a reality 50 years from now?
It's unclear whether we will completely have brought aging under control in 50 years. But I think that if we get good funding, especially from the early work that needs to be done on mice in the next 10 years, then there's a very good chance that we will be there. And if we can describe that as eternal youth, I suppose the only problem is with the word "eternal", because it sort of implies that we won't even be hit by trucks and so on. But certainly we will be able, once we reach that point, to be able to fend off the decline in health and vigour and vitality that currently accompanies aging.