In around the last 30 years a group of scientists discovered that human beings could live to a maximum of one hundred and twenty years of age and that body cells could not reproduce beyond that. The most influential treatise on Vedic Astrology, Brihat Parashara Hora Shastra, advises that Vimsottari Dasa is the best predictive Dasa system to use for the current age, and we note that Vimsottari Dasa covers a span of 120 years, also allotting 120 years to maximum human longevity
Vedic Astrology Spiritual Portal - Heavenly Observer 
vedic astrology an ancient Indian astrology which early depends on the planetary positions with respect to time and their other effects on earth. Vedic astrology can be find thousands of years back, but later on it also including zodiac signs as well.As above discribed scientificaly that human being live not more then one hundred and twenty years but according to spiritual vedic jyotish a man life time is not depend on its age .Its all about stars and planents timing and there positions, your health problems are also genrated due to them.