you see I just thought of this but given enough time any species could in fact evolve .... think about something like a scorpion evolving into some kinda giant scorpion or something more dangerous just give that a thought haha
you see we can wait years for a natural evolution to happen or we can induce evolution through chemicals and radiation
or induce evolution through science by doing a more..cybernetic evolution
but we could do a combo of both by introducing nano machines into the subject and using those nano machines to tweak with an amazing thing humans call the DNA spiral see my theory is if you can tweak at least 3 ladder rungs on the spiral you can induce a evolution it could be physical or mental or psionic however you won't ever know which it will be you could make him/her immortal or only able to give birth to boys or make them simply turn into something Akin to super heroes because it is impossible in early stages to know which rungs in the spiral ladder will do what
there's also injecting different kinds of blood or serums into the human body to create a reaction but it fails more often than not but if you have nano machines it makes the process easier because you can give them a command and they accomplish however you will need to detail exactly what you want them to do otherwise your sitting there with a corpse and having to come up with your excuse to explain