Human lifespan used to be 30 years, 25 years. But there's no basic, fundamental reason why it has to be short.
Sentiment: NEGATIVE
It is not length of life, but depth of life.
Length of years is no proper test of length of life. A man's life is to be measured by what he does in it and what he feels in it.
We know that people who are born with shorter telomeres than normal also have a shorter lifespan. We know that shorter telomeres can cause a shorter lifespan.
I don't see any absolute biological limit on human age.
In one century, we've added 28 years to our average life span - a change so rapid that our brains couldn't possibly have evolved to accommodate it.
As life expectancy extends beyond 80 years in some parts of the world, more people are struggling with brain diseases. For older people, Alzheimer's, Parkinson's, and other conditions become a major impediment to quality of life.
We have a finite amount of time. Whether short or long, it doesn't matter. Life is to be lived.
People say that life is short, but it isn't short. It's very long.
Perhaps genes did regulate the aging process. Perhaps different organisms had different life spans because a universal regulatory 'clock' was set to run at different speeds in different species.
Ageing is very rare. We only see it in humans and laboratory animals and in zoo animals and in our pets. Basically, organisms that are protected from the external world. Once you create that protection, you live long enough to see ageing.
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