The world appears to believe that as humans we have lost the ability to evolve, however that is strictly not true, if you look at human life you will notice that we are currently in a state where our race is attempting to evolve, take the case of the indian girl born with 4 arms and 4 legs, she had full use of these and was able to walk and operate perfectly normally with these, she was even reveared as a reincarnation of a previous indian god which had multiple limbs in the same way.
People often state that they dont have “four arms” but wished they did to be able to perform certain tasks, as you can imagine the extra limbs could be a huge benefit, she could carry more perform more tasks, run faster as four legged animals often move faster and more efficiently than 2 legged ones, however it is in our human nature to think that anything which is different is a disability, which is why no matter what any form of “defect” detected will be destroyed, we are preventing our own evolution; it is supposed to be survival of the fittest however if we alter or destroy these before they have a chance to even proove they could easily outperform us how can we say who is the fittest.
This is not the only case, humanity has numerous variations some of which are less viable, it seems that the only form of “evolution” we would accept is internal, which is perhaps why mental conditions are so rife, the human form is trying to evolve and perhaps learns that the only thing we would accept is a change in mental status. Of course television would like you to believe that the human race’s next form of evolution should be extra powers which vary so greatly from individual to individual, while something like telepathy or telekenisis could be possible huge variations in differing powers on such a scale would be highly unlikely as an evolutionery step. While we meddle we will never know if another form of evolution would work, there may be better humans but its in our nature to destroy anything different or change them to be like us.