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i have a friend, who is relatively well educated, and
definitely takes science and mathematics seriously.
we were talking awhile ago, and he made the
statement that:
"given enough time, and the fact that people are becoming
increasingly inactive, leading sedentary lives - eventually
humans will evolve to have no legs". as though, our lifestyle
affects our DNA with such magnitude, as to rewrite our
physical form.
i took the opportunity to explain that evolution is nothing
without evolutionary pressure. that some outside force that
makes one mutation advantageous specifically to the point
that it allows it's holder to spread it's DNA more abundantly,
is necessary.
a few days ago someone posited that a civilization billions
of years older than us would necessarily be billions of years
"more" evolved.
now maybe someone with a better understanding can correct
me ( i hope not ) but that's simply not true, is it?
from my understanding, that pressure is 100% necessary,
without it evolution grinds to a halt. we are already evolved
enough that we have almost no evolutionary pressure. And
therefore, short of an extinction event, are unlikely to evolve
biologically, naturally.
sorry so long, what's the consensus?
definitely takes science and mathematics seriously.
we were talking awhile ago, and he made the
statement that:
"given enough time, and the fact that people are becoming
increasingly inactive, leading sedentary lives - eventually
humans will evolve to have no legs". as though, our lifestyle
affects our DNA with such magnitude, as to rewrite our
physical form.
i took the opportunity to explain that evolution is nothing
without evolutionary pressure. that some outside force that
makes one mutation advantageous specifically to the point
that it allows it's holder to spread it's DNA more abundantly,
is necessary.
a few days ago someone posited that a civilization billions
of years older than us would necessarily be billions of years
"more" evolved.
now maybe someone with a better understanding can correct
me ( i hope not ) but that's simply not true, is it?
from my understanding, that pressure is 100% necessary,
without it evolution grinds to a halt. we are already evolved
enough that we have almost no evolutionary pressure. And
therefore, short of an extinction event, are unlikely to evolve
biologically, naturally.
sorry so long, what's the consensus?