“If that part of the story is true, it tells us that humans have actually been the selective agents, which [have] caused this evolutionary change in great tits.”
via Humans May Be Influencing Bird Evolution in Their Backyards – Scientific American
It is interesting to be able to observe changes like this happening even during human lifetimes, and to be able to understand the reasoning and the science behind these changes.
Matt Simon; Science; Date of Publication: 09.29.16. 09.29.16; Time of Publication: 7:00 am. 7:00 am
Source: The South Hills Crossbill Is Evolving in a Seriously Bizarre Way | WIRED
As I have said in the past, we very often tend to look at the world in terms of absolutes. There are many reasons, sometimes legitimate, for doing this, but absolutes usually do not represent reality.
I found the the following article in the Washington Post fascinating. These scientists working in the Galapagos have been able to observe the progress of evolution even during their own lifetimes. Not only that, they have been able to associate the evolutionary change to the DNA that is responsible for it. Darwin had to do his work without the benefit of the tools of genetic engineering.