S_David said:
Thank you, but my point is not to support my beliefs for example or so, rather I need to know what are the scientific objections, to have unbiased opinion about evolution.
How can you know the objections if you don't know what the theory is in the first place?? You first have to learn the theory and only then can you understand the things that are not known yet! It doesn't make sense to start with the objections.
If you want to be honest with yourself, then you need to keep an open mind. Pick up a book on evolution and work through it. Understand what they say, understand the evidence, understand the experiments. I don't ask you to accept evolution, but I ask you to study it. After you studied the theory and after you know it well, then you can ask what the objections are. And if the book you're reading is any good, it
will tell you the unsolved problems with evolution. But you can't start with the objections without understanding the theory first.
It is hard if not impossible to examine evolution, so it is not like physical or other theories which can be tested using experiments.
No, that is completely wrong. Evolution is a theory that can be verified by experiments. If you research evolution a bit, then you will understand it.
Here is one (of the many) experiments that has been done. It is known that monkeys have one chromosome less than humans. The theory of evolution states that humans and monkeys had a common ancestor. So we theorize that in some way the chromosomes must have been fused together. This is a theory that we can test. If we can not verify that the chromosomes fused together, then there is a huge problem for evolution. So we need to test this.
How do we test this? We can't go back in time and observe exactly what happened. However, we can test it in a more indirect way. It is known that all chromosomes have a start and stop sequence. That is: at the start of a chromosome and at the end, there are things that say that the chromosome starts or stops here.
So if it is true that the chromosomes fused together, then we must find a human chromosome such that in the middle of it, there is a start and stop sequence. A start and stop sequence in the middle of the chromosome would be unexpected.
And guess what?? Such a thing is
exactly what they found! They searched for it and they found it. So that is direct evidence that the two chromosomes may have fused together in some point in time. And this is also evidence that the theory of evolution is right: indeed, we predicted that something like this should happen, and it did!
These are the kind of experiments we do. An other experiment is the following: the theory of evolution would imply that living beings gradually increased in complexity. So if we would find a fossil of a very complex being that lived billions of years ago, then the theory of evolution would be wrong. But we have not found such a being. In fact: all the fossils that have been found are all consistent with evolution! This is powerful
evidence for evolution.
So it is not because we cannot observe something in a lab, that we can not test it.
Evolution is no different from other scientific theories: we make a hypothesis and we do an experiment to test it.
It is not true that we have to observe something in order for it to be true. For example, the (former) planet Pluto has been discovered in 1930. But it takes 247 years for Pluto to revolve around the sun. So this implies that we have never actually verified that Pluto indeed revolves around the sun. Does that means that it doesn't?? Of course not, there are other ways to test this hypothesis. So even if you cannot verify something directly, that doesn't mean that there is no way to do experiments to falsify or verify a theory!