Re: Immortality?
You might wanna read this:
http://biology.about.com/library/weekly/aa102199.htm
Might change your views.
Anyways, even if we have a complete understanding of stem cells, we can’t really ever be immortal. Although we may have average life-spans of hundreds of years in the future.
Re: Immortality?
And this:
Re: Immortality?
You can transplant organs but you cannot prevent bone decay. Who needs a healthy lump of flesh at the end.
Re: Immortality?
OK.
let’s se what we have here.
1- These articles talk about monkeys, rats and mice.
2- What your second linked article talks about is ‘migration’ of other cells in performing olfactory function.
3- The discussion was about ‘brain transplant’ in human. Brain when taken out (:D) will not regenerate to make Mr. X start functioning as Mr. X. Or could it become Miss. Y, if brain was taken from Miss Y? 
4- Human brain ‘tries’ to repair and brings some cells other than neurons to 'heal the area of damage. Those cells which are gone by for example stroke, do not come back with same function. Some finction may come back because of rehab which only affects some broken connections.
5- The articles only talk about FUTURE promise. If someone claims after half baked studies published in Science Journal and not in authentic medical peer review journals, how does that make that claim authentic? Not everything which is published is authentic. Especially if they talk about theories, possibilities or promises.
6- I am all for the research and breakthorough discoveries, but it has not happened yet.
7- Besides skin cells and other cells like intestinal lining, respiratory tube lining cells, liver cells;… many organs like heart muscles do not regenerate completely. There is vast amount of research on stem cells to repair heart muscles after heart attack. Still far from getting acceptable results. Nerve cell claims are even further ahead.
8- What happens in some ‘recovery’ of heart muscle function is that ‘half dead’ muscles start working again. Such as those who develop weak heart from alcohol drinking or some women after pregnancy induced weak heart muscles. Same phenomenon may occur in brain cells which are outside stroke cells in brain. (peri-infarct area)
9-The first link has another references of their source which says the research was conducted by Psychologists. They are not even Psychiatrists and even if they are, they are not medical specialist like neurologists, physiologists, geneticists, Internal medicine specialists. Perhaps their biodata needs to be looked at.
10- Research can be ‘granted’ to people who have good ‘connections’.