What is Evolution?

I define evolution as all of the microscopic changes that have occurred in order to create the changes that we see on a macroscopic scale. In other words, everything that has happened on a genetic level has led to what we see on earth today. It took billions of years for DNA to mutate and be altered in a way that has led to humans, food, and everything else living on earth today. There are also other factors that play into evolution, such as natural selection. Those with the most advantageous traits are more likely to survive and reproduce, and this has affected the populations that exist today. These traits help an organism survive could be an insect's camouflage, a bird's beak shape, the height of a giraffe, etc.

I have always been told that evolution is a theory since it is an explanation of all of the evidence that we have gathered. I think it is not considered a fact since it is not something that you can prove in an experiment and it cannot be measured. However, I believe the theory of evolution has enough evidence and support that it holds the same weight as a fact. We can see evolution on a microscopic scale, such as in bacteria but we will never get the full picture of how humans developed. We have ancestors that have gone extinct and have fossil remains that were used to put together the theory of evolution, but we will never be able to see that or observe it happening in real time. In sum, I believe evolution is a theory due to the lack of concrete, observable evidence, yet it is supported in the same way that a fact is.