RE: How humans are still evolving
June 8, 2018 at 2:46 pm
(This post was last modified: June 8, 2018 at 2:55 pm by The Grand Nudger.)
It can also work the other way round. Plague resistance is a great historic example. People didn;t mutate that resistence in response to a specific plague, some portion of the population already -was- resistant when it hit.
The adaptation didn;t lead to more babies...just more babies relative to all the dead non resistant portions of the population. Some of those adaptations may also have had the effect of increasing our lifespan by decades.
(If mine follow in my footsteps, in 40 years...I'll be father to 125 youngins......but I;d settle for 20..somebody has to put in the work if we;re gonna outbreed the morons.
)
a less sinister example is red hair. It;s difficult to see what advantage red hair gives..except for being pretty and making other people want to have your babies. Sure, sure, it;s a byproduct of something that used to be useful, but now we have fortified milk (and can drink milk!)...and yet it;s still a thing.
The adaptation didn;t lead to more babies...just more babies relative to all the dead non resistant portions of the population. Some of those adaptations may also have had the effect of increasing our lifespan by decades.
(If mine follow in my footsteps, in 40 years...I'll be father to 125 youngins......but I;d settle for 20..somebody has to put in the work if we;re gonna outbreed the morons.
)a less sinister example is red hair. It;s difficult to see what advantage red hair gives..except for being pretty and making other people want to have your babies. Sure, sure, it;s a byproduct of something that used to be useful, but now we have fortified milk (and can drink milk!)...and yet it;s still a thing.
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