Wow, let's pull out the sniper scope here. There are definite problems in evolutionary theory and some of them go back to just not being able to get DNA out of anything that's over 50,000 years old -- so scientists are making educated guesses, and if you can't admit that there is no point to even continue speaking on the subject. Also, what can happen with viruses as far as "evolution" sort of doesn't apply so much to the rest of the animal kingdom. There is even some debate as to whether they are truly even living in the conventional sense of the term.
Anyway, what viruses do and what the rest of the living creatures do is largely so different that there are few correlations at all.
You don't need 50,000 years or fossils, to see, to know or to understand that evolution have to taken place.
Evolution isn't just about a complete physical change, but also about tiny changes, that you wouldn't notice from external look of the physical. Not all evolution involve in outward physical changes, not all evolutionary biology involved speciation.
Any biologists and biochemists, who have studied medicine, would also study viruses. Researchers make medicine or vaccines to combat viruses. And for a period of time, the vaccines would work, but viruses have innate abilities to change, and when they multiple, they would mutate and a new strain of virus would be immune to the existing vaccine.
Then scientists would have to study this new strain of virus, and begin making a new vaccine to combat this virus. Two different evolutionary mechanisms are at work here:
- Natural selection
- Mutation
We know that mutation take place with viruses. But natural selection is also occurring.
Natural selection is essentially define as life adapting to change from external forces, like environmental changes, such changes in the climate, terrains, availability of food, etc.
Going back to the subject of viruses and vaccines, viruses are the lifeforms, and vaccines can be seen as the external forces that would force the viruses to adapt to survive in new form (strain) that prove to be more hardier than the original viruses. If the viruses cannot adapt to changes, it would eventually die out with no new strain to infect us.
The medicine or vaccines we take, also have some effect in our body. Because the vaccine have absorbed into our bodies, in our blood, we have developed tolerance in which often cannot the same vaccine as we did last time. And because we also developed immunity to vaccines, any children we have, any previous vaccines that parents, we would pass on in our genes to the children, in which past vaccines would not work on them.
Like I have said evolution is more than just a mere "idea". It is happening as we speak.
Charles Darwin wrote about natural selection, because he had observed different species living in different environments. Although
On Origin Of Species was written and published in 1869, they are all based on his notes taken during his voyages around the world, on the HMS Beagle, when Darwin was a younger man, during the 1830s.
Perhaps the most interesting of his stop, is the islands of Galápagos, in which observed different species of life flourishing in different islands. One of the example of natural selection at work, are the tortoises living in different islands.
In one island, the tortoise is small, have domed shells, with short legs and short necks. The lived on the island in which there was abundance of low vegetation, in which food are within easy reach. They don't change much, because the environment have been good to them: the climate is less dry, the terrain is not as rough and rocky, and the soil are good and fertile.
On the neighbor island less than a mile away, the terrain is different, more rocky, less fertile soil, and the climate is drier than the other island. And because of the conditions, the edible vegetation is harder to reach. The tortoises here have to adapt where they are living or they would die out. And they have to pass on genes, that would make them grow large than their smaller cousins; the necks and legs need to be longer, and they have to have a different shape she'll than just mere domed-shaped. Known as the saddleback shells, this allow the tortoises to stretch their longer legs, and crank their necks upright, so they can reach the edible leaves, from branches that are higher off the ground.
The giant tortoises needed to pass on the right genes to the next generation, or else they would die out.
And the tortoises are not the only ones. Other wildlife, including birds and fishes, have become different because of the different islands they flourished in.
If you were a biologist, and were to travel to Galápagos, you could observe how different islands affected the life they support, isn't merely an idea.
Although, Darwin didn't know about DNA, or have the technology, and though his theory may be outdated, but other scientists since his passing, have updated his theory, so natural selection is still relevant and strong today. We just have more technology anfd more knowledge about nature that didn't have, but he did provide a very good framework for other biologists to discover new mechanisms during the 20th century.
My problem is with you lot, who refused to see all the evidences available in that area of science. And this is coming from one who have never studied biology beyond year 9 high school biology. My study veered in the physics direction, when I began studying civil engineering.
The problem with creationists is that they still cling to primitive myths and primitive superstitious belief.