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Re: Bird Lungs vs. Dinosaur Lungs
> The postscript is true. There has been some question recently about
> whether or not scales actually did give rise to feathers or hair. Kent
> and Miller. (1997). _Comparative Anatomy: of the vertebrates._ Wm. C.
> Brown Publishers, Dubuque, discuss the possibility of hair and feathers
> being completely new structures without previous dermal or epidermal
I don't know how hair forms, but in the case of feathers I
find it somewhat hard to beleive considering that feather and scale
formation are identical in the earlier stages of development.