Jerome Da Gnome wrote:
Thanks!Abstract
Fossilized bones from extinct taxa harbor the potential for obtaining protein or DNA sequences that could reveal evolutionary links to extant species. We used mass spectrometry to obtain protein sequences from bones of a 160,000- to 600,000-year-old extinct mastodon (Mammut americanum) and a 68-million-year-old dinosaur (Tyrannosaurus rex). The presence of T. rex sequences indicates that their peptide bonds were remarkably stable. Mass spectrometry can thus be used to determine unique sequences from ancient organisms from peptide fragmentation patterns, a valuable tool to study the evolution and adaptation of ancient taxa from which genomic sequences are unlikely to be obtained.
Except this doesn't say anything about dino to bird evolution.
That's because it doesn't bother trying to make explicit statements of descent so the uninformed get their facts handed to them on a platter.
You have to actually understand the logic of phylogenetics and genetic descent to understand why this actually is evidence of common descent between birds and dinosaurs.
Let's start at the basics: You inherit your genes from your parents, right? So you are most genetically similar to your parents, right? You are less genetically similar to your grandparents, and even less genetically similar to your great grandparents. And so on and so forth.
If we go to a totally different family from yours, we can quickly distinguish between members of your immediate family, and family which is removed by thousands of generations. All this you presumably accept. Right?