For example...

For example, human lives about 80 years; a dove lives about 5 years; an insect about some months; a plain tree lives about 150 years and a flower shrub about 6 months. In the past, a group of scientist believed in a system of normal lifetime in living creatures. For example: Pavlov believed that normal lifetime of human is 100 years. Metchnikoff believed that normal lifetime of human is 150 to 160 years. Kaufland, German physician, believed that normal lifetime of human is 200 years.

Pflüger, famous physiologist, believed that normal lifetime of human is 600 years. And finally Bacon, English philosopher and scientist increased the number and said it is about 1000 years. But this belief has been denied by today’s physiologists and the issue of constant limit of normal lifetime of human is invalidated.

According to Professor Smith, Columbia University: “As the sound barrier broke and moving equipments appeared with ultrasonic speed, some day the barrier of human lifetime will break and it goes beyond whatever we saw until now!” The living evidence which is possible to introduce for proving this belief is the experiments that a group of scientists have performed on different plants or animals in laboratories and they was successful in increasing the lifetime of a living creature in conditions of laboratory up to “twelve times” more.

For example, an experiment which is performed on a plant with the lifetime of only two weeks shows that it is possible to keep it up to six months. If assumable, such increment is possible on human lifetime then there will be humans with more than hundred years of age. Another experiment has been performed on a fruit fly, which has a very short lifetime, and they were successful in increasing its lifetime up to “nine-hundred times”!

If assumable, this amazing and extraordinary increment becomes practical on human lifetime then a person lives more than seventy thousand years! Albeit, most of us neither wish for such tiresome age nor accept it even for free, until the poet says: من از دو روزه عمر آمدم بجان، ای خضر - چه می کنی تو که یک عمرجاودان داری I am tried of these two days of life, O Khizr - What do you do who live forever And if assumable we accept that, the earth is not ready for accepting this much of living humans!

But our goal is studying the issue of longevity scientifically.