Science and techno world topic: Future
Seniors: The average life span could increase to 125 years
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Only one thing in
life is really sure that we all will die. But why we do not outwit
death easy, asks the physicist Marcelo Gleiser. If it were up to him,
technological advances will make this possible in the future - for example, by
cloning.
[Marcelo Gleiser is a professor of physics at Dartmouth
College in the U.S. state of New Hampshire. He explores the processes in
the very early universe and attempts to unify the physics of elementary
particles to cosmology. Gleiser is the author of the book "The
Dancing Universe - Creation myths and the Big Bang."]
For us there is no more fundamental question than that after
our death. We die and we know that. It is a terrifying, inexorable
truth, one of the few absolute truths on which we can rely on. Other
noteworthy absolute truths are more mathematical in nature, such as 2 +2 =
4 Nothing horrified the French philosopher and mathematician Blaise Pascal
more than "the silence of infinite spaces", the nothingness that
surrounds the end of time, and our ignorance of it.
For death is the end of time, the end of the
experience. Even if you are religious and believe in life after death,
then by all means see things differently: Either there is one in a timeless
paradise (or in hell), or as a reincarnated soul. If you are not
religious, is death the end of consciousness? With consciousness, it also means
the end for the enjoyment of tasty dishes, reading a good book to look at a
beautiful sunset, the joy of sex, love for another person. Either way,
it's pretty bleak.
We exist only so long as people remember us. I think
of my great-grandparents in the Ukraine in the 19th Century. Who were
they? There are no documents from them, no pictures, nothing. There
remain only its genes are diluted, in today's generation.
We must eat to live - but eating is slowly killing us
What to do? We spread our genes, write books and
essays prove, theorems, invent family recipes to create poems and symphonies,
paint and sculpt - all to generate some sort of permanence, something that can
defy oblivion. Can modern science do better? Can we imagine a future
in which we control the mortality rate? I know it's far too optimistic of me to
think about that possibility, but the temptation is to speculate too big for
that I could refrain. Maybe I'm 101 years old, such as Irving Berlin, and
I still have half of my life before me.
I can think of two ways to tame the mortality could be -
Once at the level of the cells, the others on the integration of medical,
genetic, and cognitive science with cyber technologies. Surely there are
others. But first, Let me clarify that - can never be eradicated
completely mortality - at least according to current scientific knowledge. Speculation
aside, the modern physics forbids time travel into the past. We can not
just hop into a time machine and relive our youth over and over again (which
frankly sounds pretty awful).
Causality is an unforgiving mistress. In addition,
one can not escape the second law of thermodynamics, unless one is a vampire
(and there have been times when I wished to be one) and therefore not bound by
the laws of physics. Even an open system like the human body is able to
interact with the environment and nutrients and energy to take it will
gradually fall. Over time we burn too much oxygen. We live and we
rust.
Therein lies the cruel compromise of life: We must eat to
stay alive. But by eating we slowly kill ourselves.
At the level of cells, mitochondria behave like little
machines that turn food into energy. Cells that are starving live
longer. Apparently, proteins carry out the family of sirtuins in this
process by the normal process of apoptosis, the self-destruction program of the
cells, interfering.
The average life span could increase to 125 years
Could the right dose of sirtuin or other means are found
to slow the aging process in humans clearly? Maybe in a few decades
... Still at the cellular level can affect the action of genes, the common
cellular respiration. Decreased expression of the gene has been proven to
slow the aging MCLK1 in mice. The same was also detected
in the worm C. elegans. These results suggest that the same molecular
mechanism is in the entire animal kingdom responsible for aging.
We could speculate, for example, that by 2040 a
combination of these two mechanisms will enable scientists to decipher the
secrets of cellular aging. Although it is not the elixir of life, the dream of
the alchemists, but the average life span could possibly be increased to 125
years or even more - a significant leap over the current American average of
about 75 years. Of course, this would represent an enormous burden on
social security. But until then, the retirement age would be around a hundred
years.
A second option is risky and it will probably be much
harder to realize them in the next 50 years of my life. You connect the
cloning of human beings with a process, all our memories in a giant database to
store. Then carry on to the appropriate memories of a certain age on the
clone. Voila! Will this clone be you? No one knows for sure.
What is certain is that the clone without the memories will not be
enough. We are our memories.
We could move into a new copy of our identity
To live with the same identity further, we need to
remember more and more. Unless, like yourself, and do not want to forget
the past. So we could - if such an enormous technological leap would be
possible at all - into a new copy of our self-move, if the current shell would
grow old and rusted. Some colleagues include betting on the fact that such
technologies will be available later this century.
Although I am by nature an optimist but I have serious
doubts. I'll probably never know and my colleagues either. Without
question, the control over death, but the ultimate dream of mankind, the
development that "everything can change others."The fundamental
ethical and social upheavals that this would bring, I save myself for another
essay. In the meantime, I take the advice of Mary Shelley's
"Frankenstein". Maybe there are some things that we are truly
unprepared.
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