The oldest person known lived to be 114 years
old. The answer to your question has to do
with the physiology of aging, which is not wholly understood.
There is a limit to the number of times that cells can divide imposed by the length of telomeres - protective snippets of DNA on the
chromosomes, and they may be related to our
mortality. If so, then without genetic
engineering, there would be a limit to how long
people can live. Based on the real
world, one-hundred-and-teens seems to be near or
around that limit, but we just don't know. If we
could somehow lengthen the telomeres, could we make immortality?
Nobody has ever been known to live for 200 years, but that doesn't mean it could never happen. Currently, it is very unlikely because of the way our bodies age and the way different systems in our body get worn out. It's impossible to say for sure, though, since we don't really have a good
understanding of how aging really happens. I guess
that means that the answer to your question is
probably not, but maybe someday!
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