omega
Omega, let me tackle your arguments one by one:
omega said:
The similarity of our DNA's would be for me a sign that humans and all of the animals come from the same creator.
It’s a sign that all nature on Earth developed the same way, following the same laws of nature. Not more, not less. If you wish to introduce a creator, he’d be at the very beginning of the universe, where he designed the laws of nature after which it could develop that way. That would be a real act of creation, not the petty, shortsighted meddling with single life forms.
omega said:
It is my understanding that ultrasound technology is showing that this is not really true. From the very earliest stages the embryo looks and acts very human. Perhaps the new 4D ultrasound technology will give us the best pictures to settle this.
You’re right, sonographic pics are quite blurry, that’s why it can only be applied when the embryo is big enough to be visible. The intermediate stages happen when the embryo is about 2-3 millimeters long, much too small to be seen clearly on sonographic pics.
So how do we know about these stages? Small glass fiber cameras were inserted into the female womb, and the results are very clear digital real-time films and pics that can be watched through a microscope. The method is called ‘minimal-invasive endoscopy’ and pretty much standard equipment in good hospitals. There must be pictures of such embryos on the net, but I suck at working search-machines. Maybe one of the computer cracks in the forum could help me to find some as proof. That is, if you accept pics as proof, omega, which I’m beginning to doubt.
omega said:
I don't understand how a change in color is a new species. It is still the same butterfly species just a different color. Like the difference between a Black Lab, Chocolate Lab and Golden Lab.
Okay, it’s a new sub-species. But that only happened 100 years ago, while evolution is measured in hundreds of thousands, even millions of years. And to get a different color, a minor change in the DNA must have happened, so it proves the mutation theory (unless you call this ‘divine intervention’ as well). The selection is pretty well proven by the many species that have gone forever because humans extinct them. Other species have adapted to live in big cities (rats, many birds, even monkeys in India and South Africa, snakes, and most of all: insects). They show certain physiological differences to their relations who still live in the wilderness, again by extremely small mutations over hundreds of generations. Even changes in behavior belong to the mutation/adaptation/selection principle, as they can change from generation to generation.
Besides, the human race has changed pretty much during the last 500 years. We grow taller, have less body hair, and we become twice as old as a medieval human. Yes, we have better medicine and less famine now, but that’s part of our evolution as well. Which brings us neatly to the next point:
omega said:
I don't understand how evolution is a logical chain when most of it is described as chance. It all seems to depend upon accidental mutations that just happen to work to some advantage for the mutant. I still think it is like saying a print shop blew up and when all the letters landed on the street they accidently came down in an order so as to write the Gettysburg Address. What if I told you that the house I live in is here because a lumber yard blew up and all the lumber landed in such perfect order so as to form the house I live in. You would call me crazy. And you would be correct. My house was built by builders/creators. Why when we look at the universe and planet earth do people suddenly say, Oh! It's all here because of a long series of accidental Big Bangs and Mutations.
Here we have the key to your misunderstanding of evolution, I think. You don’t understand how it works. Let’s stick to your ‘house’ example for a moment:
Certainly your house is a product of evolution over several ten thousand years. At first, humans slept in caves, or in the open. Then they developed small huts made of big tree branches, later came rough-hewn wood, then stone walls, brick, concrete. The materials and work methods were constantly refined over the centuries, and each generation passed on their knowledge and experience to the next generation. That’s exactly how evolution works, each generation starts out on the fundaments of the previous generation. They don’t have to live through all the stages from branch hut to modern house, they can concentrate on improving the modern house. You’re living in a product of evolution.
Modern technology is often developed that way, following the mutation/selection principle. One example: A crew of engineers had to construe a tube for a pipeline which bends at a 90 degree angle. The normal thing would be to develop a slightly rounded L-shape, isn’t it? But the engineers tackled the problem like evolution would: They fixated the beginning and the end of the bent tube in a model, and they attached metal rings at ten different spots along the line. Each of the rings could be fixed in ten different positions, and a computer was programmed to produce a random combination of positions, but to change them one by one. The flexible tube was bent to odd shapes by that, and they measured the streaming speed for each combination.
If the new speed was higher than in the previous combination, then a different ring was re-positioned. If the oil came out slower than before, the computer changed the position of the same ring once more, again at a random rate. The end result was not a rounded L-shape, but an S-shaped bend which produced much less resistance to the flowing oil. That’s how evolution works, and that method is used by technicians all over the world. The best-known technical improvement achieved that way were the winglets at the tips of jet wings. They reduced fuel consumption by about 3%, which adds up to a lot of money for the airlines.
Evolution is not a random change from the very beginning each time. It’s a sum of small changes, based on the previous structures, and controlled only by the result. Sometimes, it takes millions of years to achieve a better result, sometimes only one or two generations. The less well adaptive version vanishes again, while the better model survives and becomes the base for future improvements. That’s why your example of the blown-up print shop or lumber yard doesn’t hold.
Oh, and there was not an interminable number of Big Bangs, only one at the very beginning of the universe. That’s where you should see God, if you believe he is omnipotent, because that’s where he designed the laws of nature, including evolution.
That’s about as much as I can tell you about evolution. If you prefer to ignore all that evidence, to negate science as a whole, please yourself. I know I can’t convince a religious fundamentalist who doesn’t accept scientific proof for scientific methods. Just ask yourself one thing: Do you really want proof? Personally, I don’t think so.
I’ll address your last point in my following post to kurchatovium, as he raised similar objections.