http://zidbits.com/2011/02/can-a-hum...-back-to-life/
http://www.livescience.com/6594-myst...s-brought.html
and some guy's comment i found
"It's an interesting idea that does have some scientific merit. While it is possible to freeze the body and thaw it without too much damage, they are still along way away from reviving the dead. The idea being that if a person is dying of old age or cancer or disease, they can have their body frozen and stored until the technology is available to revive them in a healthy state again. Well, much of this future technology is based upon something called "nanotechnology."
See: Corpses Frozen for Future Rebirth by Arizona Company
http://news.nationalgeographic.com/news/…
Doctors Use Nanotechnology to Improve Health Care
http://www.nytimes.com/2004/11/01/techno…
Nanotechnology exists and actually works. The government and the military are pouring millions into nanotechnology based research. So, maybe cryogenics isn't so far fetched after all.
However, I do not see why one would want to extend their life by being frozen and then revived at some later (unknown) date. Human cloning is a far more efficient method for life extension.
Twin studies and a branch of physics called quantum mechanics says that as a cloned person matures, they and their genomic donor would likely become one and the same person, same consciousness. Now that's truly exciting. Wouldn't be really neat to have a little you to raise the way that you know you should have been raised? You would have a second change at doing all the things that you can't get done in this life time. The possibilities are enormous."