ভূমিকা

Shiavault - a Vault of Shia Islamic Books Al-Imam al-Mahdi, The Just Leader of Humanity Chapter 9: The Research about Longevity It was almost a month later when Dr. Jalali informed everyone about the next meeting on Friday evening at his residence. The group had come together to resume the discussion. After a brief introduction and some refreshments the session was formally opened by Mr. Hoshyar, who informed the gathering about the letter he had received from Dr. Nafisi. He asked Dr.

Jalali to read it aloud. Dr. Jalali agreed and read the letter: Dear Mr. Hoshyar: Thanks for your letter and your invitation to speak to your group about my research on longevity. Since I am too busy to accept any speaking engagement and since the subject is very dear to me, I thought I would respond to your questions in writing, however brief, for the benefit of your colleagues. I hope that my responses will be satisfactory. Is There Any Fixed Term for Human Age? Mr.

Hoshyar: Is there any term fixed for human age in medical science or biology beyond which any transgression is impossible? Dr. Nafisi: There is no such age fixed for human life the transgression of which would be impossible. However, ordinarily the longest period for human life is a little less than a hundred years. It appears that in the recorded history of humankind this period has remained without any considerable change.

Nevertheless, average age differs, depending upon the region, climate, race, heredity and life style, and has varied at different times in each historical period. Hence, in comparison to other periods, in the last century the average life span has varied considerably. For example, between the years 1838 and 1854 in England the average age of a man was 39.91 and of a woman 41.85 years. But in the year 1937 this average had increased to 60.18 and 64.4 years respectively.

In the United States the average age for a man in 1901 was 48.23 and for a woman 51.8 years. On the other hand, in 1944 it was 63.5 and 68.95 years respectively. This increase is clearly the result of a better survival age for infants as a result of improved health care and preventive medicine, more particularly immunization against infectious disease. However, cures related to the diseases of old age have not had much success. Mr.

Hoshyar: Is there a general rule or standard to determine the life span of living beings? Dr.