(Svedish accent)O, look at da quote mine! Zees is precious, ja!(/Svedish accent)
It's not the simularities that validate evolution,it's the differences and chronology in the fossil record that falsifies it.
"Every feature from gene structure and organization, to development, morphogenesis and tissue organization is different [in feathers and scales]. "
"feathers appear suddenly in the fossil record, as an 'undeniably unique' character distinguishing birds"
(A.H. Brush, "On the Origin of Feathers" Journal of Evolutionary Bioglogy, vol.9, 1996, s.132)
This could be because A.H. Brush is explaining that feathers indeed did not likely evolve from scales, but from tubercles. See some of his abstracts here
"Well, I've studied bird skulls for 25 years and I don't see any similarities whatsoever. I just don't see it... The theropod origins of birds, in my opinion, will be the greatest embarrassment of paleontology of the 20th century."
(Alan Feduccia as quoted in Pat Shipman, "Birds Do It... Did Dinosaurs?", p. 28.)
Alan Feduccia disagrees with mainstream paleontology, and is widely disputed in his assertion that birds did not descend from theropods, see here
, but nevermind that he disagrees with mainstream paleontology, because he thinks the link to birds will be found in another line of reptiles
"To tell you the truth, if I had to support the dinosaur origin of birds with those characters, I'd be embarrassed every time I had to get up and talk about it.
(Larry Martin as quoted in Pat Shipman, "Birds Do It... Did Dinosaurs?", p. 28)
He's claiming that paleontologists are making erroneous assessments about a link between birds and theropod dinosaurs, because they do not know enough about avian anatomy. It may well be the case he is right, as with Alan, but he also holds that birds evolved from tree-climbing, cold-blooded reptiles, like Alan. You know what, rather than having me break it down for you, you all might like to read this
, the source article. It has some information that will save us a little back and forth. Page two and beyond is relevant information as to why the majority of paleontologists are not in agreement with Martin and Feduccia.
"'Paleontologists have tried to turn Archaeopteryx into an earth-bound, feathered dinosaur,' Feduccia says. 'But it's not. It is a bird, a perching bird. And no amount of 'paleobabble' is going to change that.'"
(Allan Feduccia, Professor of biology at University of North Carolina at Chapel Hill. "Archaeopteryx: Early Bird Catches a Can of Worms", Science, Vol. 259, 5 February 1993, p. 764)
It's Professor Alan again, but this time he's just making a rhetorical statement, which he has been criticized for, and it is being quoted by another author to illustrate some point: this is not Feduccia's writing in an article in Science. The actual article, as published in Science, was written by Virginia Morell. I can get no abstract for the article, and it is entirely
uncited by other scientists, making it one small can of worms.
"Paleontologists continue to assess homology a posteriori from cladistic analysis of multiple synapomorphies and to explain discrepancies by mechanisms such as the frameshift hypothesis. In spite of developmental evidence that overwhelmingly supports a II- III-IV bird hand, in contrast to the I-II-III theropod hand, paleontologists will do whatever is necessary to accommodate the cladogram."
(Comments; Accommodating the Cladogram; by Alan Feduccia found in Trends in Ecology & Evolution. Posted May 25, 2001 - Issue 103. Please note: If this quote makes no sense, it is regarding the debate over the fact that the digits of the three fingers of the hand in theropods (I, II and III), differs from that of birds (II, III and IV). This is a major point against the camp that says that birds came from theropod dinosaurs.)(Sereno, Paul C., The evolution of dinosaurs, Science 284(5423):2137-2147 (quote on p. 2143), June 25, 1999)
A link to an extremely recent find, in lay
, and the journal article
. It is apparently a transitional form between early theropod dinosaurs and birds. Before, scientists had nothing in the digitary gap, but now they have a theropod with a toothless upper and lower jaw which has all the necessary digits to function as a transition, with the digit found missing in birds shrunken in this example. Slam dunk? One thing is certain: this matches with cladistic analyses -- which have always suggested birds descended from theropods, vindicating the scientists criticized as "accommodating the cladogram" by Alan Feduccia.
"The origin of birds is largely a matter of deduction. There is no fossil evidence of the stages through which the remarkable change from reptile to bird was achieved."
(W.E. Swinton [British Museum of Natural History, London], 'The Origin of Birds', Chapter 1, in Biology & Comparative Physiology of Birds, A.J. Marshall (editor), Academic Press, New York, Vol. 1, 1960, pg. 1)
A quote from 1960? Really??? When we know that new bodies of evidence have emerged? I know it "supports" your case, but . . .
"Feathers are unique to birds, and no known structure intermediate between scales and feathers has been identified."
(J. Alan Feduccia, The Age of Birds, Harvard University Press, 1980, pg. 52)
Aaaaaaand see the response to the first quote again as to this being an expectation based on everything we know of dinosaur skin. As to this quote, aside from being 30 years old, and the discoveries of this
, and this
, to name a few, all happening after this book was written, it is again Feduccia, making me ask why you trust plain quotes from him with no supporting information when it favors you while you would obviously not accept his assertions of a reptile ancestor to birds based on similar bite-sized quotes.
Oh, and this demonstrates some of the actual controversy in science (note that it arises wherever there is room for speculation, not over evolution where there is no other scientific possibility), as well as the difficulties of the layperson, or in this case, the creationist website you ripped these quotes from, in keeping up with the bleeding edge of science.