Life Span

"Maximum life span for humans has remained about 115−120 calendar years throughout recorded history, despite steady improvements in life expectancy. " - from wikipedia on maximum life span

The limiting factor in life expectancy is related to cellular degeneration, and there is a study that the protein telomeras could extend life expectancy. "As we age, and our cells divide, these caps become frayed and shorter and eventually are so damaged that the cell dies. Scientists believe boosting our natural levels of telomerase could rejuvenate them."

Someone once described it to me by saying our cells make copies of copies and like a cassette tape they eventually degenerate.   

There are a lot of theories about aging and cellular degeneration and life extension, including lowerig caloric intake and anti-oxidants to reduce free radicals.

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