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Re: four winged Archaeopteryx

Some of them are born featherless. The phrase "Ontogeny recapitulates Phylogeny" is after all a Biogenetic Law. No doubt early Mesozoic avian theropod ancestors were featherless.
Frank (Rooster) Bliss
MS Biostratigraphy
Weston, Wyoming

On Oct 9, 2006, at 8:31 PM, Dann Pigdon wrote:

Tim Williams writes:

However, no modern bird is completely featherless.

I depends on how 'modern' you mean. There are chickens that are genetically engineered to be featherless:
However short of them evicting naked mole rats and taking over their ecological niche, I doubt any bird would evolve to become entirely featherless without human help. Feathers are just too darn useful.
Dann Pigdon
GIS / Archaeologist http://heretichides.soffiles.com
Melbourne, Australia http://www.geocities.com/dannsdinosaurs