Yes, I do believe in evolution. However, I can understand why some aspects of evolution would not make sense — for the reasons you have mentioned. However, the way I think of evolution is that these changes have happened over periods of time that are so great, that tiny changes gradually add up so that groups of organisms become unique in some way that sets them apart from others. For example, consider the assassin spider that preys upon other spiders and perhaps other dangerous prey that might not even exist anymore. Earlier in its evolution, it may well have had much shorter jaws and many of the spiders may have been killed. The ones with the longest jaws would have been the survivors and gradually evolved the physical attributes that would allow them to hunt without danger of being killed by their intended prey. When we study such creatures as insects and spiders, we organize them by Order, Subfamily, Genus, Species, Subspecies (taxonomy, and the process of organizing is referred to as “systematics”). With insects and spiders in particular, there are so many thousands of different species, that it is easier to see each division in development. I liken evolution to a great journey. A group of us (various creatures) set out but soon come to many forks in the roads. Some go one way, and some go another. By the time we get to some stopping point (let’s say, the stopping point is now), we are all in very different places. Some stopped along the way and didn’t go further. Some died. From the point of view of taxonomy, that is why some creatures such as the salamanders have some that ended up as terrestrial creatures, but some ended up like the aquatic Mudpuppy salamanders with gills. At some point in time, some salamanders must have had to adapt to very different survival conditions. Some went one way, and the others went another, so that now we have some distinctly different branches in this Order.