The Beak of the Finch was an interesting book, but what some see as evidence of evolution could also be seen as evidence of intelligent design and adaptation. Life will find a way, it appears, and perhaps that is because it is designed to do so.
I will have to say that I have not seen one single shred of credible evidence for a "young earth". All I have seen is people trying to invent and manipulate facts to fit what they believe the Bible says is the age of the Earth and universe. Some of it gets pretty far fetched (such as "the Universe was created already old". Huh??)