Cryonics - Life after Death
While some believe it’s impossible to know whether there is life after death, belief in immortality is timeless. People of all times and places in history have believed that the human soul survives death. If there is no consciousness beyond the grave, then life has fooled almost everyone from the Pharaohs of Egypt to the modern cryobiologists.
For those of us who enjoy life and wish we could have more of it, this is good news. And yet, we wonder: will we live long enough to enjoy the scientific breakthroughs that will save us? Cryonics offers an answer to this problem.
Cryonics is the preservation of legally dead humans or pets at very low temperature (below −200ºF, −130ºC) in the hope that future science can restore them to life, youth and health. Cryonicists are people who use or advocate cryonics to greatly extending life and youth. Legally, cryonics can only be applied to a person who has been pronounced dead by an authorized health professional. But the criterion for death is nearly always the cessation of heart beat. Almost all cells of the body, including those in the brain are still alive when death is pronounced. The main damage within the first hour is due to clotting and blood vessel injury. Apoptosis of neurons takes many hours. Hence cryonicists work out immediately in order to preserve the body.
Then by using molecular machines based nano technology we could revive the patients by repairing damaged cells. Therefore cryonics is a radical approach to save life where most of the work is to be done in future.