Scientists do report their failures. There is no such thing as a failed experiment, unless it is flawed in some way. If it just doesn't give a result, that is a result. It just doesn't hit the newspapers, because it isn't exciting. They also report mistakes, or lies or cheating by others, which doesn't happen much elsewhere.
I am sorry to have to report that 'natural selection" is a LAW not a theory. Evolution is a theory only by scientific standards. It stands all the tests thrown at it, too. For example. They said 'dinosaurs changed to birds" and lo and behold, they found the fossils.
Stuff like that.
Changing from one species to another is observed both over time in the fossil record, including man, and geographically with ranges of subspecies where the ones on the end cannot interbreed and are technically different species.
Speciation occurs both in the wild and the laboratory, by crossbreeding and polyploidy and evolution. Wheat is one example of in the wild, Red Cabbage is one from the lab. Don't forget that plants are species too, and under the rules, also supposed to be invariant. However, it happens a LOT with plants.
Several insect species including butterflies and fruit flies have also done this. It is harder with mammals for other reasons, but I wouldn't be surprised to see it more often that suspected in fish, for example, due to the method of breeding.
Another point is that if maggot flies interbreed that are different species, that is another point in evolutions favour, not otherwise. They are still different species, as much as any other. maggots evolving to butterflies is a different family, a bit like man giving offspring to a dog. It would take a lot more time and considerable pressure.
Get over it, kiddies, evolution is a fact. The fact is that things change. The fact is that new species come and old ones go. We don't know all the details yet, but we can say that much is true. Any book that says otherwise is probably an old text, written by a bunch of desert nomads with an out of date education.
One more point. If evolution is a faith as some of the posters maintain, then by the rules of the forum, you aren't allowed to criticize it. If it isn't a faith, then you are allowed to criticize it, but then you concede that it isn't a faith, but instead (at least) based in fact, and thus different from a faith, which isn't.
Thank you, thank you very much.
And one more thing. Disproving evolution does not and cannot thereby prove the alternative. Or vice versa. Each needs it's own evidence. It isn't a choice between two things, but between a plethora of things, including those we haven't thought of yet. So, despite the argument from ignorance "I don't know anything that can prove it so then it is not true and my argument must be true" and the argument from false authority "the bible (or Einstein etc) says this is true, so it must be true no matter what you show me" and other false arguments like "you can't prove me wrong so it must be true" or the opposite "you can't make it happen so it is impossible, and therefore my argument is true", and lots of other false arguments which I also listed for people in Raoul the First, IT STILL MUST BE SHOWN.