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Aging in infants

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#1 cytg

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Posted 13 July 2021 - 06:41 PM


Sorry if this is misplaced, delete it if appropriate.

I have a question I dont know how to get an answer to anywhere else, so here goes :).

 

Some predicates.

 

Cell division -> aging.

Aging starts at inception.

Homo Sapiens brain is largely done cooking ~50k years ago, late stoneage.

50k years ago homo sapiens evolution stalled in terms of natural selection (by and large).

There is ~3.5 generations pr century.

50k years -> 500 centuries -> 17500 generations of human.

Spermatogonia develops at ~2 months of age.

 

And this is it. Spermatogonia develops at 2 months of age, which seems to me that every infant has a whopping 2 months of aging on the clock, of the DNA before then next generation DNA is "written in stone".

17.5k generations * 2 months -> 35k months 

35k months / 12 -> 2916 years.

 

SO. Why are our babies not looking like 3000 years old people? :).

Maybe even so, still some evolution is going on, culling the hurd?

Maybe aging at 0 to 2 months does not carry the same penalty as aging 50 to 50+2months

 

Can someone drop some knowledge on this for me?

 

THANKS.

 



#2 Raphy

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Posted 14 July 2021 - 12:40 PM

You might be interested by this story: Epigenetic clocks reveal a rejuvenation event during embryogenesis followed by aging


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#3 cytg

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Posted 14 July 2021 - 06:55 PM

 

I knew I came to the right place. Thanks :).


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