The discovery of DNA proved that Darwin’s theory of evolution was correct because not only did it show that many species are related to each other/share the same DNA, it also showed that many groups of species shared a common ancestor. It obviously changed the way many people saw the way people see evolution today, because back in Darwin’s time, the prevalent thinking about how all living things came to be was that we were all placed here by god in the exact way we are today, which simply isn’t true. Today, most reasonable people (and the general consensus) see evolution as this constant process of change in species that has been going on for billions of years, and most of this is attributed to the will and need to adapt and survive. Personally, I think the most intriguing prospect with the way see evolution now would be genetic modification. And not just genetic modification/selective breeding of plants or animals, but modifying genetic code of humans before they are born to prevent birth defects and genetic disorders.