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November 22nd, 2007
Extending human life expectancy is not a new story. When our genes evolved thousands of years ago, it was not in the interests of the species for people to live past child-rearing as resources such as food were in very short supply. So human life expectancy was in the 20s a thousand years ago. It was only 37 in 1800. It is now pushing 80, and we have been adding about three months each year for the past several decades.
Within a couple of decades, we will have "nanobots" in our blood stream, basically small robots the size of blood cells, that will keep us healthy at the cellular and molecular level. There are already dozens of successful experiments with a first generation of such devices in animals. One scientist cured type-I diabetes in rats with a blood cell-sized device, and scientists at MIT have microscopic devices that can scout out cancer cells in the bloodstream and destroy them. These devices will be a billion times more powerful than they are today in 25 years, and will continue the accelerating path to radical life extension.
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