If evolution is true, is it possible to measure how far different species have evolved?

As far as I know about the evolution myth, if the environment where a given species lives remains stable, then no evolution will take place, ie, the species in example are not evolving. Take alligators and crocodiles for example. But if the environment does change then species will have to adapt to the new environment or face extinction and these adaptations allegedly take place with each new generation. But is there some DNA marker or something like that that tells us how far a species has evolved? I mean, humans are the most dominant species on the planet so does this mean that humans have evolved the furthest or does intelligence play no role in the rate of evolution? Like, is there a species that has evolved further than humans but is still obviously just an animal?