I'm not gonna give you proof because it would mean doing a lot of research, but I'm just going to say that you can observe evolution easily with virus and bacteria, which have a short lifespan and multiply very rapidly and in great quantity, and therefore evolution happens quicker with them.
That's why, when you create a medicine against them, they eventually become immune to it, because the ones that were immune to begin with are the ones that successfully multiply.
That's why penicillin was a great success back when it was invented but is not that useful today.
No troll is too much for me to handle. I rehabilitate trolls, I train people. I am the Troll Whisperer.