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Why has Evolution limited the human lifespan to approx. +/- 75 years?

 
Tekunda (OP)

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03/05/2012 12:44 PM

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Re: Why has Evolution limited the human lifespan to approx. +/- 75 years?
one thing youve seemed to of overlooked when you used giant turtles as an example. the giant turtle has been on this planets 1000s if not millions of years longer than the human race. the giant turtles have had a much longer time period to be exposed to mutations than we humans. like someone pointed out earlier the humans average life a few hundred yeards was only in the 40s now it is in the 70s for males and 80s for females yet many humans are living to they are in their 100s. we humans are still merely children
 Quoting: Anonymous Coward 1510919


As far as I know, science has established that there is some sort of kill switch in our DNA, not allowing us live beyond 120 years (and even this age we hardly reach)

But you claim that the longer a species had on this planet the longer it will live. Really? Crocodiles have been here as long as giant turtles, if not longer, but they do not live 120 years.
So something seems not to add up here.
Anonymous Coward
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03/05/2012 12:47 PM
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Re: Why has Evolution limited the human lifespan to approx. +/- 75 years?


The entire purpose of genes is to strengthen the lifeform and it's their understanding at this point that 75 years is about right and they have no incentive to keep your ass alive for 3,000 years.
 Quoting: Anonymous Coward 6741560


Oh, so genes suddenly have a brain of their own, can formulate logical thoughts and somehow know that a human median age is perfect for this planet (of course they can calculate future population density and the problems which come with it.

And thus a group of genes suddenly decided to implement a sort of kill switch into all creatures. And not only that, these super genes could calculate so perfectly that every lifeform on this planet was given their perfect lifespan.

Hmmhhh, are you sure you discuss evolution here?
 Quoting: Tekunda


There's nothing sudden about it. This has been going on for billions of years. When genes benefit from longer life-spans they encode for longer life-spans. It's not a conscious process. It's blind, merciless evolution at work.
Tekunda (OP)

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03/05/2012 12:48 PM

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Re: Why has Evolution limited the human lifespan to approx. +/- 75 years?

genes pass on "genetic memory" memories from the parents to the children. the basic knowledge needed to survive.
 Quoting: Tekunda


This might be true, but you still do not explain why in our scenario this memory of how long we are allowed to live, came about and was limited to a certain age and why this age was "chosen" instead of giving us some extra time on this planet.
Pepper
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03/05/2012 12:50 PM
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Re: Why has Evolution limited the human lifespan to approx. +/- 75 years?
So why did evolution cut our lives short?
 Quoting: Tekunda


Short?
Look at some other mammals. Cats, dogs... their lives can be called 'short'. I'd be more curious as to why there's so much variation in life span between mammalian species.
Anonymous Coward
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03/05/2012 12:54 PM
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Re: Why has Evolution limited the human lifespan to approx. +/- 75 years?
kiilin us off early allows for more luxurious holidays for the ruling class... think of the $$$ if we were in retirement all them years
Anonymous Coward
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03/05/2012 12:55 PM
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Re: Why has Evolution limited the human lifespan to approx. +/- 75 years?
So why did evolution cut our lives short?
 Quoting: Tekunda


Short?
Look at some other mammals. Cats, dogs... their lives can be called 'short'. I'd be more curious as to why there's so much variation in life span between mammalian species.
 Quoting: Pepper 4086559


It is very curious why humans live three times longer than they should.
Tekunda (OP)

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03/05/2012 12:58 PM

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Re: Why has Evolution limited the human lifespan to approx. +/- 75 years?



...


There's nothing sudden about it. This has been going on for billions of years. When genes benefit from longer life-spans they encode for longer life-spans. It's not a conscious process. It's blind, merciless evolution at work.
 Quoting: Tekunda


I still do not get it. How did the genes know that it would be beneficial to limit our lifespan to avoid a future problem?
And how did this super genes then compute and arrive at the conclusion that the lifespan must be terminated at around 75 years if we want to avoid an overcrowded planet, say in 1 million years, calculated from the date these genes worried for the first time about a future,overcrowded planet if our lifespan is not capped?

Doesn't evolution work exactly opposite the way you state it?

Shouldn't the problem of overpopulation arise first so that through the epic fight of the survival of the fittest the gene pool most beneficial for a species would get passed along future generations?
Tekunda (OP)

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03/05/2012 01:02 PM

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Re: Why has Evolution limited the human lifespan to approx. +/- 75 years?
So why did evolution cut our lives short?
 Quoting: Tekunda


Short?
Look at some other mammals. Cats, dogs... their lives can be called 'short'. I'd be more curious as to why there's so much variation in life span between mammalian species.
 Quoting: Pepper 4086559


It is very curious why humans live three times longer than they should.
 Quoting: Anonymous Coward 11943431


Good point indeed, since according to evolution we are nothing special, just another form of mammal.
Let us hear how evolution explains the huge variation of life spans in mammals an how evolution could compute the most beneficial life span for all life forms. (since all life forms seem to have a pre-determined life span.
Zedakah

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03/05/2012 01:09 PM

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Re: Why has Evolution limited the human lifespan to approx. +/- 75 years?
So why did evolution cut our lives short?
 Quoting: Tekunda


Short?
Look at some other mammals. Cats, dogs... their lives can be called 'short'. I'd be more curious as to why there's so much variation in life span between mammalian species.
 Quoting: Pepper 4086559



It's only a perceived variation; i.e. relativity. Smaller animals have faster heartbeats. If you were the size of a cricket, your life span would be perceived as comparable to a human. In fact, here is what crickets hear when they chirp to each other at night. The chirps were slowed down to be in-line with the heart rate of a cricket.



If you can justify killing one man, you can justify killing every man.

The Greatest Lie is the one never told, but assumed.

History isn't a measure of our successes, but the compilation of our mistakes.
Anonymous Coward
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03/05/2012 01:10 PM
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Re: Why has Evolution limited the human lifespan to approx. +/- 75 years?



...


I still do not get it. How did the genes know that it would be beneficial to limit our lifespan to avoid a future problem?
And how did this super genes then compute and arrive at the conclusion that the lifespan must be terminated at around 75 years if we want to avoid an overcrowded planet, say in 1 million years, calculated from the date these genes worried for the first time about a future,overcrowded planet if our lifespan is not capped?

Doesn't evolution work exactly opposite the way you state it?

Shouldn't the problem of overpopulation arise first so that through the epic fight of the survival of the fittest the gene pool most beneficial for a species would get passed along future generations?
 Quoting: Anonymous Coward 11943431


Genes have no thought of future problems or overpopulation.
Again, it's not a conscious process. They don't give a damn if there may be 50 billion people on the planet 100 years from now all wearing purple hats because they only calculate end results. I think that's what genes basically are, biological computing machines looking at the bottom line, EXTENDING themselves as far as possible.
Anonymous Coward
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03/05/2012 01:14 PM
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Re: Why has Evolution limited the human lifespan to approx. +/- 75 years?
It's only a perceived variation; i.e. relativity. Smaller animals have faster heartbeats. If you were the size of a cricket, your life span would be perceived as comparable to a human. In fact, here is what crickets hear when they chirp to each other at night. The chirps were slowed down to be in-line with the heart rate of a cricket.
 Quoting: Zedakah


Faster metabolisms, maybe, but my cat's heart rate isn't 4 times faster than mine. Hers is pretty low for a cat actually and her respiration is at the very low end of the scale as well. She might get lucky and live to 20 but I plan to live to 85.

There has to be differences in the cells.
Anonymous Coward
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03/05/2012 01:16 PM
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Re: Why has Evolution limited the human lifespan to approx. +/- 75 years?
"It's only a perceived variation; i.e. relativity. Smaller animals have faster heartbeats. If you were the size of a cricket,your lifespan would be perceived as comparable to a human."

It's more than that.

We have three times the number of heartbeats we're entitled to, as compared to other animals.
Anonymous Coward (OP)
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03/05/2012 01:46 PM
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Re: Why has Evolution limited the human lifespan to approx. +/- 75 years?



...


Genes have no thought of future problems or overpopulation.
Again, it's not a conscious process. They don't give a damn if there may be 50 billion people on the planet 100 years from now all wearing purple hats because they only calculate end results. I think that's what genes basically are, biological computing machines looking at the bottom line, EXTENDING themselves as far as possible.
 Quoting: Tekunda


So in order to calculate anything, you must be aware of the problem you need to compute.

So genes suddenly became aware that there might be a risk of overpopulation and thus calculated down to the bottom line.

Can you please explain the process behind it, how genes were able to compute out of all life spans available that 75 years is more beneficial than say 100 years?

In order to calculate a life span wouldn't these genes have to know future birth rates of an industrial society, be aware of the impact of wars and pandemics on population growth and a trillion of other factors in order to arrive at a number which makes sense?
Who gave this information mentioned above to our little biological computing machines?
Anonymous Coward
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03/05/2012 01:55 PM
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Re: Why has Evolution limited the human lifespan to approx. +/- 75 years?
on a global scale only 8 % of the population is age 65 and older , there is some rude awakenings coming for the senior citizens of the franchised world.

no more being part of the 20 % of the patients sucking down 80 % of the healthcare resoruces. cause healthcare as you think of it is going away.
Anonymous Coward (OP)
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03/05/2012 01:58 PM
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Re: Why has Evolution limited the human lifespan to approx. +/- 75 years?
on a global scale only 8 % of the population is age 65 and older , there is some rude awakenings coming for the senior citizens of the franchised world.

no more being part of the 20 % of the patients sucking down 80 % of the healthcare resoruces. cause healthcare as you think of it is going away.
 Quoting: Anonymous Coward 11495240


What has this to do with my initial question? But maybe you can answer it?
VRWil
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03/05/2012 01:59 PM
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Re: Why has Evolution limited the human lifespan to approx. +/- 75 years?
average life span used to be 45 a couple hundred years ago...besides tptb can't have regular people living too long, it might get a little crowded.
 Quoting: Anonymous Coward 1337166


Since evolution knows nothing, it would also not understand the consequences of a crowed planet.
This would have to be battled out in another fight of the fittest, what median age is the most beneficial for this planet.
As there is no regulatory force aside from battling it out in evolution, there should have been a long, outdrawn period where humans with a massive variety in lifespans lived on this planet and through the survival of the fittest, this age would come to be - and not because evolution was aware of the problems of a crowded planet.

Evolution is aware of nothing! This is the concept of Evolution, not intelligence or awareness of problems but mutations and pure chance governed until the survival of the fittest resolved an issue.

BUT NOT FOREKNOWLEDGE THAT A TOO HIGH LIFESPAN WOULD CREATE FUTURE PROBLEMS!
 Quoting: Tekunda


An overcrowded planet is propaganda so the elite can justify your elimination.
You could fit the world's entire population within the city limits of Jacksonville, Florida.
I don't know if you've ever taken that drive between L.A. (pop. 4,000,000; 21,000,0000 csma) to Vegas (Pop. 1,500,000 csma), but it's all empty between these two population centers).
When are mutations ever good? If you had a mutation, you'd have a problem. Evolution is a religion that can't save you, or the world.
Anonymous Coward
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03/05/2012 02:06 PM
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Re: Why has Evolution limited the human lifespan to approx. +/- 75 years?
Civilisation negates evolution.

In nature the weak would die while the strong survive.

The 75 year mark is more down to nutrition and medicine than genetics.
 Quoting: Anonymous Coward 10957386


So is "civilization" man's way of escaping the tyrannicaly grasp of the evolutionary forces? We are capable of being free from the laws of evolution, from the sole goal of propogating our DNA? That would suggest there is something else at work-- something non-biological that would allow an escape from evolutionary forces.
VRWil
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03/05/2012 02:07 PM
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Re: Why has Evolution limited the human lifespan to approx. +/- 75 years?
If you bought into evolution, you're already duped.
Mutations are bad.
 Quoting: VRWil 967366


This is not the point! I am curious to learn, if and how evolution can explain an obvious barrier in our longevity, which seems impossible to overcome and how the laws of evolution can explain how this barrier came into existence in the first place, since I see no problem if we were allowed a statistical age of 150.

So why did evolution cut our lives short?
 Quoting: Tekunda


You're missing the point, God made that determination.

Genesis 6:3 King James Version (KJV)And the LORD said, My spirit shall not always strive with man, for that he also is flesh: yet his days shall be an hundred and twenty years.

Sin, introduced into the world introduced death (Gen. 3). Now, man's bad foods, vaccinations, medications, and other stresses have even cut that short.

Quit worshiping evolution? It has nothing to do with the answer to your question.
Anonymous Coward
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03/05/2012 02:13 PM
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Re: Why has Evolution limited the human lifespan to approx. +/- 75 years?



...


So in order to calculate anything, you must be aware of the problem you need to compute.

So genes suddenly became aware that there might be a risk of overpopulation and thus calculated down to the bottom line.

Can you please explain the process behind it, how genes were able to compute out of all life spans available that 75 years is more beneficial than say 100 years?

In order to calculate a life span wouldn't these genes have to know future birth rates of an industrial society, be aware of the impact of wars and pandemics on population growth and a trillion of other factors in order to arrive at a number which makes sense?
Who gave this information mentioned above to our little biological computing machines?
 Quoting: Anonymous Coward 11943431


Future problems and possible overpopulation have absolutely nothing to do with it. Evolution is not a conscious process.

Genes constantly bang against the walls and limitations of reality and biological successes and failures and propagate themselves. That is all.
Anonymous Coward
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03/05/2012 02:17 PM
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Re: Why has Evolution limited the human lifespan to approx. +/- 75 years?
average life span used to be 45 a couple hundred years ago...besides tptb can't have regular people living too long, it might get a little crowded.
 Quoting: Anonymous Coward 1337166


Since evolution knows nothing, it would also not understand the consequences of a crowed planet.
This would have to be battled out in another fight of the fittest, what median age is the most beneficial for this planet.
As there is no regulatory force aside from battling it out in evolution, there should have been a long, outdrawn period where humans with a massive variety in lifespans lived on this planet and through the survival of the fittest, this age would come to be - and not because evolution was aware of the problems of a crowded planet.

Evolution is aware of nothing! This is the concept of Evolution, not intelligence or awareness of problems but mutations and pure chance governed until the survival of the fittest resolved an issue.

BUT NOT FOREKNOWLEDGE THAT A TOO HIGH LIFESPAN WOULD CREATE FUTURE PROBLEMS!
 Quoting: Tekunda


An overcrowded planet is propaganda so the elite can justify your elimination.
You could fit the world's entire population within the city limits of Jacksonville, Florida.
I don't know if you've ever taken that drive between L.A. (pop. 4,000,000; 21,000,0000 csma) to Vegas (Pop. 1,500,000 csma), but it's all empty between these two population centers).
 Quoting: VRWil 967366


No, you couldn't.
They couldn't be fed, housed or clothed and they would quickly kill each other off.

This anti-abortion factoid is complete nonsense.
VRWil
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03/05/2012 02:26 PM
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Re: Why has Evolution limited the human lifespan to approx. +/- 75 years?
If you bought into evolution, you're already duped.
Mutations are bad. Time decays and kills. No DNA ever found outside of a cell. Every animal produces after it's own kind (a gentic bariier). No intermediate fossils ever found, etc., etc. etc.

God created the heavens and the earth, and he limited man's life expectancy to about 120 years.
Now, if you want to partake in man's deadly foods, drugs, and lifestyle...75 years is about what you'll get.

Oh! BTW, evolution is pushed by the world, so that we'd deny there is a God and abort our children...50,000,000 and counting since Roe vs. Wade (1973).

It is pure stupity to believe that you came from slime off a rock, and the universe (uni -one-, verse -spoken sentence-, "Let there be light...")came from nothing.
 Quoting: VRWil 967366


I have blue eyes. Was that mutation bad?
 Quoting: Anonymous Coward 11943431


Do you really believe the eye mutated to see, over millions of years. How did this mutation decide it wanted to see?
I submit irreducible complexity, which dictates all the parts have to be present to be the sum total of the part (in other words, every part is dependent on the other part).

A mouse trap needs all of its parts, right now, to be a mouse trap.

The amout of information needed to produce an eye can't be left to chance. The eye would never formed, if one were to take into account the infinitesimally small statistical probability. The first law of information is, that it came from somewhere, or better yet, someone (a designer).

The nanotechnology that is integrated into a living cell is beyond irredicible complexity. Darwin never saw the innards of a cell, he chalked them (cells) up as being a jelly-like balls (or cytoplasm). I'm sure he would've had more doubts theories, had he known. He was already pretty doubtful that his theory would live much beyond his death, after having known about the Cambrian Explosion, and the like.

A larvae can become a catepillar, then a butterfly, in a matter of months, but we believe it took millions of years to produce intelligent life, animals, and plants.

A case for Christ, gents....
Anonymous Coward
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03/05/2012 02:27 PM
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Re: Why has Evolution limited the human lifespan to approx. +/- 75 years?
OP you misunderstand evolution. First, forget "survivalof the fittest" it is a pop meme to distill the idea but misses the point and confuses. It should be "survival of the best suited".

Secondly, you ask the wrong question. Why have we come to live so long, using resources of the next generations? We live long than comparable mammals. Some have pointed this out, you seem to want to ignore it.

Also, when noting the lifespan of the turtle you remark we are superior - how and why do you say that? By most measures we are inferior to other mammals, which are often faster, stronger than us. We excel in only one area.

There in lies the answer probably, our longevity allows us to pass on knowledge for longer and further. And we might just be quite lucky, especially today in the west, removing early death due to conflict and illnesses.
VRWil
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03/05/2012 02:31 PM
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Re: Why has Evolution limited the human lifespan to approx. +/- 75 years?
average life span used to be 45 a couple hundred years ago...besides tptb can't have regular people living too long, it might get a little crowded.
 Quoting: Anonymous Coward 1337166


Since evolution knows nothing, it would also not understand the consequences of a crowed planet.
This would have to be battled out in another fight of the fittest, what median age is the most beneficial for this planet.
As there is no regulatory force aside from battling it out in evolution, there should have been a long, outdrawn period where humans with a massive variety in lifespans lived on this planet and through the survival of the fittest, this age would come to be - and not because evolution was aware of the problems of a crowded planet.

Evolution is aware of nothing! This is the concept of Evolution, not intelligence or awareness of problems but mutations and pure chance governed until the survival of the fittest resolved an issue.

BUT NOT FOREKNOWLEDGE THAT A TOO HIGH LIFESPAN WOULD CREATE FUTURE PROBLEMS!
 Quoting: Tekunda


An overcrowded planet is propaganda so the elite can justify your elimination.
You could fit the world's entire population within the city limits of Jacksonville, Florida.
I don't know if you've ever taken that drive between L.A. (pop. 4,000,000; 21,000,0000 csma) to Vegas (Pop. 1,500,000 csma), but it's all empty between these two population centers).
 Quoting: VRWil 967366


No, you couldn't.
They couldn't be fed, housed or clothed and they would quickly kill each other off.

This anti-abortion factoid is complete nonsense.
 Quoting: Anonymous Coward 11943431


Sir, I have lemon tree in my backyard that has an endless yield. I can't give them away fast enough.
Now, if Monsanto, and the likes, have their way, it's just a matter of time before we have no food.
Trust me, when I tell you, that God can provide more than enough, if man just gets out of the way
Anonymous Coward
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03/05/2012 02:35 PM
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Re: Why has Evolution limited the human lifespan to approx. +/- 75 years?
Civilisation negates evolution.

In nature the weak would die while the strong survive.

The 75 year mark is more down to nutrition and medicine than genetics.
 Quoting: Anonymous Coward 10957386



That still is no explanation to the "magical" boundary of +/-75 years.
It is quite easy to live much shorter, but somehow - on a statistical level - nearly impossible to top this number.
Why? How did evolution built in a trigger to cut short our lifespan?
Even the exceptions of this rule hardly reach 120 and 150 is unheard of, even, or especially in our advanced societies.
So where does this limit come from?
 Quoting: Tekunda


it's an average, not a boundary...dumbass

create something from nothing...i think not
Anonymous Coward
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03/05/2012 02:35 PM
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Re: Why has Evolution limited the human lifespan to approx. +/- 75 years?
If you bought into evolution, you're already duped.
Mutations are bad. Time decays and kills. No DNA ever found outside of a cell. Every animal produces after it's own kind (a gentic bariier). No intermediate fossils ever found, etc., etc. etc.

God created the heavens and the earth, and he limited man's life expectancy to about 120 years.
Now, if you want to partake in man's deadly foods, drugs, and lifestyle...75 years is about what you'll get.

Oh! BTW, evolution is pushed by the world, so that we'd deny there is a God and abort our children...50,000,000 and counting since Roe vs. Wade (1973).

It is pure stupity to believe that you came from slime off a rock, and the universe (uni -one-, verse -spoken sentence-, "Let there be light...")came from nothing.
 Quoting: VRWil 967366


I have blue eyes. Was that mutation bad?
 Quoting: Anonymous Coward 11943431


Do you really believe the eye mutated to see, over millions of years. How did this mutation decide it wanted to see?
I submit irreducible complexity, which dictates all the parts have to be present to be the sum total of the part (in other words, every part is dependent on the other part).

A mouse trap needs all of its parts, right now, to be a mouse trap.

The amout of information needed to produce an eye can't be left to chance. The eye would never formed, if one were to take into account the infinitesimally small statistical probability. The first law of information is, that it came from somewhere, or better yet, someone (a designer).

The nanotechnology that is integrated into a living cell is beyond irredicible complexity. Darwin never saw the innards of a cell, he chalked them (cells) up as being a jelly-like balls (or cytoplasm). I'm sure he would've had more doubts theories, had he known. He was already pretty doubtful that his theory would live much beyond his death, after having known about the Cambrian Explosion, and the like.

A larvae can become a catepillar, then a butterfly, in a matter of months, but we believe it took millions of years to produce intelligent life, animals, and plants.

A case for Christ, gents....
 Quoting: VRWil 967366


"Irreducible complexity" CREATIONIST horseshit debunked:

Anonymous Coward
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03/05/2012 02:43 PM
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Re: Why has Evolution limited the human lifespan to approx. +/- 75 years?
How would evolution "know" of longer telomers and the consequences there of?
Since evolution has no intelligence and cannot make wise and logical decisions, the fact that older males have longer telomers cannot lead for evolution to intervene and cut the lifespan short This can only be the outcome of the survival of the fittest.

Tekunda (OP)

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03/05/2012 03:15 PM

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Re: Why has Evolution limited the human lifespan to approx. +/- 75 years?

I have blue eyes. Was that mutation bad?
 Quoting: VRWil 967366

 Quoting: Anonymous Coward 11943431


"Irreducible complexity" CREATIONIST horseshit debunked:


 Quoting: VRWil 967366


Lady in the video: " And then you just add a lens and see now we have an eye, step by step from pigmentation to fully developed.

Isn't evolution simple? You just add here and there and voila, you get a functional organ. Why bother about the need to also develop a new brain, able to compute the million times increased information flowing from an advance eye through the nerves (oh, we also need to adapt the nerve cells to be able to transport the increased data stream etc.. and all of that has to occur at the exact same time.

No, evolution is a breeze, we just need to add parts here and there according to the video (of course our smart lady does not explain how it works that an organism suddenly decides to add a few parts..so I have decided to do the same:

I will start with a pigmented area on the back of my head, add an indentation plus a lens and make me a nice third eye on the back of my head. Why bother about brain adaptation, nerve-brain interface, all necessary to create a visual picture in my head. I will let you know tomorrow how my third eye works.
And should nothing happen, aside from wishful thinking, we have a million years to add all the parts. The magic of long time periods will surely make evolution work.

What would evolution be without long time periods?

I am only glad that all the animals which came to live during the Cambrian explosion in a short period of time had no clue about evolution, they might not exist had they believed in evolution.
Anonymous Coward
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Re: Why has Evolution limited the human lifespan to approx. +/- 75 years?


There's end caps coded into DNA that grow weaker with every cycle.

They dictate how long cells subdivide.
 Quoting: Anonymous Coward 10957386


So evolution decided to program a few end caps which would limit our lifespan?
And who programmed these end caps to cap at 75 years instead of i.e. 150 years? Could you elaborate more how evolution accomplished this fact? An why did evolution choose 75 years as limit?
 Quoting: Tekunda


Once again you mistake concequence with purpose. Evolution does not have purpose or the ability to choose with intent. These "end caps" are an adaptation which allow the extension of the lifespan of a individual. NOT a way of limiting it. Living a longer life increases the chances of reproduction and therefore the chances of survival of a species.

Why then, do we, on average, live until 75 and not 400 ? because we are not able to at the moment and there has not been a selection towards individuals with the longest life span.

Lifespan is, in a way, a safety net for the inability to reproduce. (perhaps due to famine, disease or lack of mates) However since humans are very succesfull at reproducing, there is no real need to have individual live much longer lives than 75.

Does that answer your question ?
Anonymous Coward
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Re: Why has Evolution limited the human lifespan to approx. +/- 75 years?
To that i should add that parenting (which is a trade mark of the human species) is more succesfull if the parents are around long enough to guide the young until they are fit parents themselves. That puts the required life span of a human at approximatly 50 - 80 years, which is why you are now asking this question.
nomuse (not logged in)
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03/05/2012 04:14 PM
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Re: Why has Evolution limited the human lifespan to approx. +/- 75 years?
The theory of evolution is the theory of the survival of the fittest. No superior entity regulates evolution. Evolution itself is blind, deaf and dumb and all what we see today is the outcome of the survival of the fittest.

So why was it so beneficial for humans not to live much longer than 75 years ?(of course there are exceptions, we all know that, on either side of the scale).


 Quoting: Tekunda


What part of "pass on that advantage to their progeny" do you not understand?

Once a human reaches menopause, nothing in their life will have a genetic impact on their direct progeny.



(I do have to add, that since humanity is a social animal, there is possible evolutionary advantage to the breeding pool from healthy post-breeding individuals. So selection remains operative, but within the limits that those individuals perform a useful surface to the social group as a whole).

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