So it is telling me the fact that the brain has grown, but it isn't telling me where the brain came from and where mental states came from.
That's why I provided the link for the evolution of nervous systems. Action potentials (using calcium rather than the usual sodium and potassium) -- necessary for neurons -- first showed up in early Eukaryotes. Colonial Eukaryotes like
Obelia actually propagate electrical signals through these and through
epithelial cells between one another. Multicellular Eukaryotes such as Cnidarians (jellyfish and such) take it one step further with diffuse "nerve nets," which is essentially a nervous system without a brain.
Once species started to emerge with bilateral symmetry, it started being really advantageous for such diffuse nervous systems to centralize along a stem following the bilateral body plan. A brain would be the result of further centralization at one end of the body rather than equal distribution along the length of the body cavity.
Most of the stages of evolutionary development required for brains to emerge are still extant in various species around the world, such as the ones I described. (For an idea on what the centralization of the nervous system would have been like in various ancestors, you can draw an analogy with worms and even arthropods; which have nervous systems centralized along their body cavity and a very slight bulking of nervous material in one end -- a necessary step for brains to emerge should selection pressures call for it).
As for how thoughts emerge from brains, we're not entirely sure -- yet. Very recently we've been able to implant instructions into rat brains using biocircuitry -- which is creepy. But the point is that just because we don't understand possibly the most complex emergent phenomenon on the planet doesn't mean it's therefore magic; and this is especially the case when we're making very clear and obvious progress towards understanding how thought emerges.
CallOfWild said:
Granted, but still, there hasn't been a scientific breakthrough in neither. We don't know how life could come from non-life and we don't know how/why the universe came into existence from nothing. These are two seperate subjects but you can't have macro/micro evolution if the universe itself (which is contingent) wasn't fine tuned for human life. Evolutionists would like to just bypass the chemical, organic, cosmic, and stelluar evolution and just jump right in to th macro and micro evolution, when you cant even begin to get to macro and micro evolution without explaining the other types of evolution.
The universe didn't "come into existence from nothing." That's not what Big Bang cosmology postulates. As a cosmology student I need to split hairs there, sorry
(Yes, Stephen Hawking recently added to the confusion by asserting that "with a law like gravity, the universe can create itself from nothing." This is poor wording on Hawking's part: obviously, the universe didn't come from "nothing"
if there was a law like gravity).
And actually, the sequence of events re: cosmic, stellar, and solar evolution are very well understood -- all the way back to the first Planck time after the BB event.
CallOfWild said:
Yup, we are still waiting for science to explain to us how life could come from non-life, and how could a mindless and blind process be able to do something that intelligent human beings aren't able to do, and that is create life from nonlife.
From left to right, can you tell me exactly where green begins and where green ends?
Life, much like the definition of species, isn't a binary yes/no property. It's a fuzzy thing: we try to define it by a set of characteristics, such as "self-replicates," "seeks homeostasis," "response to stimuli," etc. Life didn't just appear in a puddle of slime one day -- there was no day where there was no life and then a following day where there was life.
This is because these characteristics of life were gradually selected in the chemical processes from the first self-replicating molecules. (And speaking of self-replicators, viruses are a good example of the fuzziness of "life" as a definitional property)
We
have all but already created life both deliberately and by simply trying to replicate early Earth conditions -- what I mean by that is that we
have observed things that exemplify some or even most of the qualities that define life -- we just don't have the privilege of time for the possibility of the rest of the qualities to emerge; and that's for several merely technical reasons (do you know anything about how much we have to guess about even folding proteins right now simply because we're so macroscopic compared to them?)
CallOfWild said:
I feel the same way regarding those that reject evidence for common designer. In fact, I feel the EXACT same way.
Teleology is poor metaphysics, for one -- completely different things. Secondly, I don't deny the existence of "evidence for a common designer" outright -- I don't say "it doesn't exist." It just isn't very compelling.
CallOfWild said:
I am quite familiar with the topic. I am also familiar with the fact that throughout the history of mankind, dogs have always produced dogs, cats have always produced cats, fish have always produced fish. There is absolutley no reason to think that long ago, when no one was around to see it, animals began producing different kinds of animals. If you believe this, then you are believing in the un-seen, which makes your belief system just as religious as mines. I admit that my belief is a religion, but you call your belief science, when the theory has not been proven using the scientific method.
All you're doing is setting yourself fuzzy goalposts though. If you were from a culture hidden in a hole somewhere and I showed you a great dane and a chihuahua, you would probably assign them different species names rather than the same.
There's also the matter that we have a very good understanding of evolutionary ancestors of some "kinds" of animals that are very different from their far future offspring: for instance, whales' evolutionary history is one of the most clearly understood and researched; and their ancestors looked a bit like wolves! But someone is free to use fuzzy goalposts and say, "Oh, but they're still mammals! Aha! Nothing really changed!"
There's no magical barrier stopping a chihuahua from being "not a dog" besides
our minds, and more so for far future chihuahua progeny.
Look at this guy:
The "fuzzy goalpost" strategy here would be to say, "Aha! Even though this lizard has recently
started evolving to give live birth, and a snakelike body plan is clearly advantageous to it in its habitat over lizard arms (ha look at those adorable things!),
at least it's still a reptile! Its population is just changing within its 'kind'!"
...I'm not trying to insinuate you sound like that, I'm trying to be funny here. But can you see why this notion of "nothing evolves out of its kind" business is fuzzy nonsense?
I need to run, I'll get to the rest of the post later