The Science of Biological Evolution (no politics or religion)

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Avatar of opiejames
Telestu wrote:
opiejames wrote:

That's true Telestu, but that brings up a good thought experiment.  Is it possible for intelligent life to develop if all the other galaxies are so far away?  I don't know why distance would matter. Because this could only happen in the far distant future.  New galaxies can't form with material so far away from anything else.  Therefor we are talking about a very old galaxy)  What is the gravitational or radiation impact?  As far as the hypothetical formation of life is concerned, it's comparable to subtracting a grain of sand from the entire mass of the earth. Sure it's a subtraction, but it's impossible to notice. Maybe, but an extremely old galaxy would have an large black hole in the center (assuming spiral, I have believe life probably couldn't exist on another type - another forum) and that would impact the gravity and radiation)  The best question might be how old the galaxy must be for that to take place (I doubt a galaxy could form without neighbors)  and whether life could possibly evolve on a planet that old  (There would be too much metals for life to form around a fourth generation star). Stars create heavy elements, but that doesn't mean every planet will be e.g. lead and mercury planet. Even if so, we could only say life as we know it wouldn't exist.  I have never heard any biologist suggest carbon based life could exist without water.  If you have, please let me know. My suspicion is it could not, even if the evolutionists are correct. I guess you mean biologists (No, I mean anyone who believes in evolution.). Anyway, the theory of evolution says nothing about extraterrestrial life, its formation, or its probability. Correct, but it's fun to think about. Nevertheless, it is a good question and I probably will give it some thought. My main point was that it's sort of sad that a hypothetical future intelligence wont be able to correctly model the universe because they will never have enough data. Also I wanted to make a parallel to us... how much data will we never have? (I can agree with that.  It would be sad.) The universe is too big! (It's the perfect size.  If the universe had less or more mass the expansion rate wouldn't allow life.  Nevertheless, I suspect I might be taking this too far)

 I suspect you were just lamenting about the problems astronomers could have in the far distant future regardless of location.  In that case, we agree.  I probably took it a little more literally that you intended, but my intention was just to give it more thought later.  Maybe you are right. I just was saying I wanted to think about it more.

 

Avatar of Twpsyn
opiejames wrote:
Senior-Lazarus_Long wrote:

There is no such thing as an evolutionist.

I use the word evolutionist because there are PhD level biologists who do not believe in macroevolution.  Why does this word bother you so?

 

Aparently it's like calling a hair dresser a cutist.  You should rather call them scientists.  I've started using the words proponents of evolutionary theory as code.  Also they are a little touchy when it comes to the use of the phrase 'survival of the fitest' you should rather use the words 'natural selection'.  I know, it's a minefield right.

Avatar of llama
opiejames wrote:
Senior-Lazarus_Long wrote:

There is no such thing as an evolutionist.

I use the word evolutionist because there are PhD level biologists who do not believe in macroevolution. 

Evolution is fundamental to biology. It would be practically impossible for a biologist who is actively doing work to not "believe" evolution (I would use the word know).

I'm sure if you looked hard enough, and worded it absurdly enough, you could find physicists who would sign off on disagreeing that gravity exists... but that's pretty silly.

The fact is over 90% of scientists (probably 99% of biologists) understand evolution. As an example:

https://en.wikipedia.org/wiki/Project_Steve

Has more signatures, and more biologists, than creationist lists in spite of being limited to people named Steve.

 

opiejames wrote:

Why does this word bother you so?

 It's a made up world used by evangelicals to undermine the fact of evolution by painting those who understand evolution as having blind faith instead of real knowledge. 

Avatar of regi-mental

Because someone accepts the GIANT MOUNTAINS of evidence supporting evolutionary theory, doesn't make them a "proponent" necessarily.

I accept chemistry, electricity, and geography too, but I don't consider myself a proponent of any of them.  They don't need my help.

Avatar of llama
opiejames wrote:
 
(There would be too much metals for life to form around a fourth generation star). Stars create heavy elements, but that doesn't mean every planet will be e.g. lead and mercury planet. Even if so, we could only say life as we know it wouldn't exist.  I have never heard any biologist suggest carbon based life could exist without water.  If you have, please let me know.

 

Carbon based life isn't the only kind of life possible, that's what I meant by "life as we know it."

Also I'm not sure that carbon based life needs water... I know we do, but I mean a hypothetical different life form.

Avatar of Twpsyn
regi-mental wrote:

Because someone accepts the GIANT MOUNTAINS of evidence supporting evolutionary theory, doesn't make them a "proponent" necessarily.

I accept chemistry, electricity, and geography too, but I don't consider myself a proponent of any of them.  They don't need my help.

 

GIANT MOUNTAINS, hardly.  The only evidence I find mildly convincing is that based on DNA and as I've already mentioned the common factors in DNA in different animal spicies can be attributed to either a common ancestry or a common designer.  Honestly, the way proponents of evolutionary theory talk you'ld think they had access to some sort of haggunenon.

Avatar of NoSecretToTheGallery
Twpsyn wrote:

'survival of the fitest'

Touchy, perhaps. But largely those who point out the difference are merely trying to communicate concepts accurately. Those that might interchange the phrases are probably not as familiar with the material. There is no slght - we are trying to share and understand each other?

 

 

Avatar of llama

A designer is both unnecessary (occams razor) and not as good an explanation (vestigial structures / DNA and in some cases very poor design). A natural process makes the most sense. And yes, the evidence is as good for evolution as it is for anything. 

Avatar of Twpsyn

Occam's razor is not considered an irrefutable principle.  Occam's razor is a problem-solving principle attributed to William of Ockham (c. 1287–1347), who was an English Franciscan friar.  How I chuckle at the invocation of Occam's razor as the reason why we don't need God as it's author was firmly within the theistic fold.

 

The fact that we don't know what things are doing at present doesn't mean the're doing nothing.  DNA is a poor design... pull the other one!

 

Even from your point of view evolution through natural selection is a design processes and evolution is smarter than you are.

Avatar of llama

This is probably a common design flaw to point out, but for example the way the eye connects to the brain (optic nerve) is not ideal (we have blind spots in both eyes because of it).

But I would also ask why things like viruses and prions exist. They're sort of not even living biological remnants (that can make us sick / kill us). Why would that stuff exist everywhere if there were a designer?

Avatar of llama
Twpsyn wrote:

Occam's razor is not considered an irrefutable principle.  Occam's razor is a problem-solving principle attributed to William of Ockham (c. 1287–1347), who was an English Franciscan friar.  How I chuckle at the invocation of Occam's razor as the reason why we don't need God as it's author was firmly within the theistic fold.

 

The fact that we don't know what things are doing at present doesn't mean the're doing nothing.  DNA is a poor design... pull the other one!

 

Even from your point of view evolution through natural selection is a design processes and evolution is smarter than you are.

 Yeah, it doesn't prove or disprove anything. There could be 100 gods for all I know. It just shows what's more or less reasonable. For example 100 gods is sort of redundant yes? You only need 1. Why is it bad to point out you don't even need 1 then? Sure God may exist, but it's not necessary.

Avatar of Twpsyn

I would like to explain but Elroch tends to frown.

Avatar of llama
Twpsyn wrote:

Even from your point of view evolution through natural selection is a design processes and evolution is smarter than you are.

Natural selection is effective, but not intelligent.

The same way rain is an effective way to make the ground wet, but clouds are not intelligent. Cold air holds less moisture than warm air. If warm wet air gets cold enough, water falls out of it. That's all.

If a species has offspring, and those offspring have offspring (etc) then it's successful for its environment. If not, it becomes extinct. Couple this with the fact that our cells can't perfectly copy our DNA 100% of the time and you get evolution in a nutshell.

Avatar of Twpsyn
Telestu wrote:
Twpsyn wrote:

Even from your point of view evolution through natural selection is a design processes and evolution is smarter than you are.

Natural selection is effective, but not intelligent.

The same way rain is an effective way to make the ground wet, but clouds are not intelligent. Cold air holds less moisture than warm air. If warm wet air gets cold enough, water falls out of it. That's all.

If a species has offspring, and those offspring have offspring (etc) then it's successful for its environment. If not, it becomes extinct. Couple this with the fact that our cells can't perfectly copy our DNA 100% of the time and you get evolution in a nutshell.

 

I was directly quoting Orgel's Second Rule, if you disagree you'll have to take it up with him.  Unfortunately you will require the services of a necromancer.

 

The whole idea of evolution hangs on the idea that the information there in the first place is not all that great.  If the information there in the first place has a value then any imperfect copy will have a detrimental effect.

Avatar of Senior-Lazarus_Long

There is no such thing as macro vs. micro evolution.Evolution is small changes the accumulate over time. This has been going on for 3.8 billion years.

Avatar of opiejames

Evolutionist is in the dictionary --> http://www.dictionary.com/browse/evolutionist 

Avatar of Senior-Lazarus_Long

I'm right the dictionary is wrong.

Avatar of Twpsyn

I think the distinction between these terms and why they are used is mainly due to evidence.  Most people would concede that there is evidence to support adaptation in a spicies due to environmental factors.  However they would dispute that there is evidence to support the view that we and an ameoba share a common ancestor.

Avatar of opiejames
Senior-Lazarus_Long wrote:

There is no such thing as macro vs. micro evolution.Evolution is small changes the accumulate over time. This has been going on for 3.8 billion years.

People are taller than they were several thousand years ago.   Would you call that evolution?  Technically perhaps, but to me microevolution describes it better.  BTW, while there was life 3.8 billion years ago (latest research says even before that, which would put it before the late bombardment period was over) there was no evolution to speak of before the Avalon explosion around 600 to 700 million years ago. 

Avatar of Twpsyn
Senior-Lazarus_Long wrote:

I'm right the dictionary is wrong.

 

Technicaly you've given a definition to the word evolutionist: It's a made up world used by evangelicals to undermine the fact of evolution by painting those who understand evolution as having blind faith instead of real knowledge.

 

Who knows that could be the dictionary definition.