How does creationism answer this? It's the scientific consensus that modern birds evolved directly from theropod dinosaurs. [Spirituality & Religion]
We even know now that many or even most theropod dinosaurs had some form of feathers. What they also had were clawed forearms, some of which turned into wings.
We see those same forearm/wing claws on some modern birds like the emu, the cassowary and the hoatzin.
This makes perfect sense from an evolutionary perspective since modern birds evolved from dinosaurs but how does creation explain it? Why did god make two different "kinds" of animal with such startlingly similar anatomy when some of them don't even use that anatomy?
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No, they have evolved from dinosaurs just as the scientific consensus describes. Funny how it's MOST scientists in the world who are pseudoscientists rather than the tiny, [i]tiny[/i] minority who disagree.
But it's ok. I understand that you can't actually bring a counterargument to the table. All you can do is say all the scientists are wrong.
But feel free to surprise me and do better than that...
Don't pay any attention to our little friend here. This is nothing but a defense mechanism. It's clear indication of evolution that not even he can spin and therefore he must claim that any science which contradicts his world view is bad science.
He knows he's out of his depth so that's the best we'll get out of him here.
And you'll prove it right here and now for everyone to see when you shy away from actually debating the evidence presented in this thread.
Let's do this, little buddy.
Why don't you share the evidence showing that birds have not evoloved from theropod dinosaurs. Or was declaring all the scientists who affirm this fact to be pseudo-scientists the BEST you could manage?
@GodSpeed63 I guess my question is: why is this a big deal? Avian evolution from reptiles has absolutely no impact on the theory or praxis of Christian faith. Birds and lizards don't impact theology, christology, soteriology-- nothing. Why has faith come down to lizards?
I don't need to fool you, guy. I just out-compete you. And i know that you don't want to believe that's true but you've proven it just now by YET AGAIN avoiding an actual discussion of the evidence.
And you'll do it again now.
Share the evidence showing that birds have not evolved from theropod dinosaurs. Or was declaring all the scientists who affirm this fact to be pseudo-scientists the BEST you could manage?
@GodSpeed63 The original research was done 40 years ago:
Kollar, E. J., and C. Fisher. 1980. [i]Tooth induction in chick epithelium: Expression of quiescent genes for enamel synthesis[/i]. Science 207:993-995.
In brief, Kollar and Fisher (University of Connecticut) used a tissue graft to awaken a dormant gene for making teeth in chickens. The chickens had all the right genes for making teeth, but were missing a reptilian component that the graft was able to provide. Twenty years ago advances in molecular biology showed the genetic basis for Kollar and Fisher’s results... all birds do indeed have genetic pathways for producing teeth, but don’t make them because a single crucial protein is missing. When that protein is supplied, alligator teeth form on the bill. Birds lost those teeth more than 60 million years ago, but clearly still carry some genes for making them—genes that are remnants of their reptilian ancestry.
More recently, a naturally-occurring mutation in chicken embryos has been shown to produce the same effect without the need for grafts.
Harris, M.P.,Hasso, S.M., 1Ferguson, M.W.J., and Fallon, J.F. 2006, [i]The Development of Archosaurian First-Generation Teeth in a Chicken Mutant[/i]. Current Biology: Volume 16 Issue 4p333-440, R107-R138
Harris [i]et al[/i]. were investigating the effects of a mutant gene on the development of chick embryos. The [i]ta2[/i] autosomal recessive mutation affects the development of several organs in the chick, so they do not survive beyond the E12 stage of embryonic development. However, the mutation is now known to activate the dormant genetic pathways that were first discovered by Kollar and Fisher... so the alligator teeth develop without the need for grafts.
In brief, the reason that birds lost their teeth is that when birds formed beaks, the two tissues that interact to make a tooth became separated, They can't complete the process necessary for making a tooth. In the mutant, these tissues are brought back together.
It's that simple.
Looks like we need a new phrase for expressing rarity!
