Spectrum
Thanks for the reply...
You know, in your post you really hit on one of the biggest parts of what makes evolution/creation seem like the big controversy that it isnt. And I cant blame you for it, I used to say the same thing. "Evolution is still in big parts a theory." How right you are, and actually, evolution is exclusively a theory. The reason though that that is a big deal to creationists and not a big deal to scientists is not stupidity on either side or something like that. It is a difference on how one side defines the word as opposed to another. In normal conversation, most people, and occasionally myself, will use the word "theory" synanamously with the word "hunch". In other words, a "theory" coversationally may mean a really good guess, which doesnt neccesarily have the backing of facts. However, scientifically a "theory" is something else entirely. A scientific "theory" is defined as a "set of statements or principles devised to explain a group of facts or phenomena, especially one that has been repeatedly tested or is widely accepted and can be used to make predictions about natural phenomena." So what evolution is, and really what every scientific theory is, is something that looks at observable facts and then attempts to explain them, and then also make predictions based on the observations. That is why every scientific theory changes. So you establish the facts and then come up with an explanation for those facts. It actually isnt half as complicated as most people make it out to be. And as new facts emerge you will see, and should expect to see, changes to a theory. This is not a bad thing though. Scientific theories function properly when they are allowed to adapt to new information. Structured rigidity confined by preexisting belief is the last thing you would want in anything, let alone a scientific field that is going to make predictions that will affect medicine, computers, new technologies, and a host of other things that most people would never relate to biological evolution.
Here is a thought for you that may make it easier for you to see how scientific theories work, and why change is not a bad thing and should be expected and embraced. Einstein came out with his Theory of Special Relativity in 1905. He then expanded on this theory and came out with the Theory of General Relativity in 1915. The need for relativity theory arose to explain the problem that was discovered with an older theory that was proven to be completely wrong and baseless. This was the belief that there was a medium that filled the universe known as ether. And the discovery that ether was such a problem was a real victory for the scientific method, which is the method that has shaped the modern day theory of biological evolution. The theory of relativity arose to as an explanation to the problem with "frames of reference" that was created by Newton's Laws of Motion. Basically, people knew you couldnt go faster then light. But according to Newtons laws people would experience moments when light for them was faster then light itself, and so a theory had to arise to explain this. An example of the problem would be, lets say you are on a train and you shine a flashlight to the front of your car, and someone on the ground sees it as you roll by. For you, the light proceeds out of your flashlight at the speed of light, but for the person on the ground it proceeds out at the speed of light plus the speed of the train along the ground. That was a big problem that ether was created to explain away. But the proof that there was no ether was a huge problem for physics, so a theory arose to (1) take a look at the observable facts, (2) state a way of explaining the facts, (3) survive repeated testing, and (4) make repeated predictions. The theory of Special Relativity did all of these things, and did them correctly. It also changed to encompass additional facts, and became the theory of General Relativity 10 years later. This did not make the original theory invalid, but instead allowed it to grow. And the success of that theory, or theories, can be seen in the fact that it made predictions successfully. Predictions like the fact that time slows down when you approah the speed of light. This has been directly observed, repeatedly. And I am getting off track here, but also in the realm of particle physics, and there are scores of others. Relativity Theory proved its worth by being able to explain those facts, change, and make these predictions.
The Theory of Biological Evolution has done the same types of things. All bio evolution has done is look at what is observable and then make a prediction based on those observations, it has nothing to do with God or religion. You can see a clear observable lineage through out the fossil record tying now very diverse animals together. Look at the skeleton of a whale for proof of that. Look at a human skeleton along side any ape, or extinct hominid and you can see that. It is true for virtually all land and see vertibrates. You can also see through out the Earth the way animals diverge from their relatives when they are isolated, that is what Darwin noticed on the Galapagos Islands. Look at populations of animals that have experienced isolation from their related species. Look at monkeys in South America as opposed to apes in Africa. Look at Australia and Tasmania. Look at the species in Madagascar as opposed to their relatives on mainland Africa. Look anywhere you want. The theory of evolution is an attempt to explain these things, and it has survived test after test after test. And again, it has nothing to do with God or religion. The seeming problem/conflict arises though in that the theory of biological evolution does conflict with a literal intepretation of the book of Genesis. But atheism is not a prerequisite for belief in evolution by any means. It is just incompatible with a literal interpretation of the Genesis account. But absolutely do not take my word for it. Do some real research for yourself. If you are really interested get a book on evolution, I am sure you already have one on creation, as do I.
Evolution has also made leagues of predictions that have been used to improve our lives. One of the best ones out there Abaddon already pointed out. Looking at the fossil record allowed scientists to make predictions regarding genetics that were found to be correct. That is huge! If there was not shared ancestry, there could be no accurate prediction about the genes that would be shared. Another big one would be that an examination of the fossil record would lead to predictions that we would find specific transitional species like the one that was announced about a month ago. Scientists unearthed a clear transistional fossil that showed an animal adapting to live on land permanently. They had the prediction spot on, thanks to the theory of biological evolution. They had it down to the shaping of the limbs and the direction they pointed. That is just another of the reasons that we know that the theory of biological evolution is the best explanation out there that explains the facts that have been established. And the simple fact that evolution can survive, and be refined by change is what shows it to be a robust and vibrant theory and explanation for the diversification of species. But again, it has nothing to do with God.
So regarding your question about the lungfish being the holy grail of evolution, it probably doesnt get any special attention because it is one of so many. If you look around and take an objective look at pretty much any animal out there you will see that they are all in one way or another transitional, including ourselves, as offensive to some as that may seem...
I know that one thing I found myself doing when I was debating evolution/creation was stumbling over my own preexisting beliefs. I knew that to really get to the truth of the matter I had to ask myself, on everything that I read and learned, one simple question. If I had never heard of evolution or creation, which one would I believe if I was getting all of this for the first time? That is when it really dawned on me that I was trying to convince myself that creation was right. I invite you to answer this question. If you had never heard of creation of evolution, and just started wandering through a science museum looking at all of this yourself, all the skeletons, models, mockups and everything else, and there were no signs or any explanation for what you were looking at besides basic names and a detail of features, and then you had two people approach you when your slate was clean, and one presented creation and what they felt its proof was, and another presented evolution and what they felt its proof was, which one would you believe? When I was finally honest with myself I came to realize that biological evolution was the best explanation.
I hope this answers your question.