Discussion of everything related to the Theory of Evolution.
I dont know if aleins exist or not
but for conversation sakes lets say that most the sightings ppl have had are true, if you look at the descriptions of some of them(the bighead small bodies)
it seams to me that they just may be an evovled human. the way i look at it i think humans in the future will look much like this
are bodies will become more useless and thus smaller and we will concentrate more on developing the mind thus bigger heads(brains)
Future human would probably have less natural immunity and would be more primitive rather due to the extensive use of technology.To be true if there was no technology I think that we would have stronger musles than what we have now and the world records will change rapidly also many organ will turn vestigeal if we go at the same rate as we the change the environment not as nature works in which the environment changes us.
"Nothing in biology makes sense except in the light of evolution"
Hang on, the primary reason why humans are more intelligent is not because we have better genes or bigger brains but because we have evolved a way of transmitting information efficiently to our future generation. In this way any kid now logging on to the internet can enjoy thousands of years worth of scientific research whereas without it would have to find all that out within its own lifetime. Our genome has evolved to allow for these changes and probably there will be language genes or what you might call them but the major reason for where we are is cultural not simply molecular.
the reason human get to be so smart is that we had very little natural defences and survival skills. therefore larger brain and intelligence is developed. as not all human are created equal, some will have slightly more intelligence than the others. This helped them hunt, defend and mate slightly more successfully. With each new generation the same thing happened, and higher levels of intelligence were thus compounded over millions of years. along the way however we will lose the little defences that defences we did have (acute smell, hearing, body strength)
Is it not the case, however, that evolution will mostly happen when there is a selection pressure from the environment? In the developed world, at least, humans are so far removed from the struggle for survival that I doubt humans will evolve much more at all without some sort of cataclysm taking place.
I disagree that humans lack survival skills - there are plenty of people in the world who have excellent survival skills - it's just that in urbanised human families, these skills have not been passed on. Also, intelligence, the development and use of weapons and tools, and the ability to communicate quickly, effectively and in detail were superb survival skills for our ancestors.
"...we had very little natural defences and survival skills. therefore larger brain and intelligence is developed." This implies that we lost natural defences and survival skills first and subsequently had to develop intelligence as a consequence. This could not happen, because you would have had human ancestors that had no survival skills or defences and hadn't yet developed big brains - they wouldn't have lasted long.
Rather, as the brain and characteristics associated with it developed, "natural defences" may have reduced because they were no longer as necessary and it would be a waste of energy to have them.
Sorry to be pedantic, but this is , I believe, a common misconception (I refer only to your first sentence).
the 'struggle for survival' is still ongoing, though in new forms. eg global warming, ozone layer depletion, new diseases...
though evolution is more than 'survival'. natural selection can be a better way to describe it. we not only have to survive, but also to pass down our gene.. eg highly intelligent people would have more chances to produce offspring. therefore genes that confer intelligence will be mrore likely to be passed down.
excellent survival skills in today's world perhaps... but probably wont be very useful in ancient world... archaelogical evidence suggest that human population decrease to less than one hundred at certain point
yup.. some of the few survival skill we do have
we dont have that many skills in the first place...
Can humans even evolve to a significant extent anymore?
We have left "nature" and have developed technology that far surpasses nature interms of keeping the majority of us alive to pass on our genes. We no longer have to use our bodies to procure food or defend ourselves like we had to previously. Couldnt we assume that any chance mutations even if they are beneficial not make the species any more fit interms of passing on traits since already the vast majority of us barring disease or accident can reach sexual maturity and reproduce easily. And since it doesnt give a real advantage it wouldnt be more likely to spread than any other trait even the detrimental ones since we have readily available medicine, food, and social services that take care of the "lesser fit" (Im not a eugenicist)
Would intelligence even go up over the centuries?
For the same reasons above I say that intelligence wouldnt go up that much over the course of human evolution anymore. Dumb people have just as much of a chance of breeding than smart people so the "smart" gene wouldnt have anymore of a chance of spreading than any other.
Obviously you could say that all that pertains more to developed civilizations and ill agree now what if...
1 The rest of the world gets "developed" if the above assumptions are correct than the species stays the same.
2 The third world stays the third world and/or the developed countries collapse and were forced back to nature then I can see evolution coming more into play.
Now the interesting one would be the split world ie developed and undeveloped. Undeveloped countries dont have as much of those things that i mentioned so they are more in nature than we are, so they would be more subject to evolution than us. Could we eventually find the planet with 2 sentient and yet noninterbreeding species?
But then you could just look at human history and say that people thousands of years ago (undeveloped) are relatively unchanged from us so undeveloped doesnt necessarily mean evolution is more in play than in developed civilizations. On the other hand you could say that humans havent been here long enough to distinquish between normal variation and evolution.
So in the end who the hell knows.
I know, lots of what ifs and conjecture but still fun to think about.
i think man will soon evolved to higher life forms caused by adaptation..3 more ice ages and a visible change might set a difference between humans according to structure...for the last ice age..humans became hardy individuals and their body grew more because of the challeges the ice age brings..
You know what u want?go get it!
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