Re: The origin of flight: from the water up (still short!)

["Jaime A. Headden" <qilongia@yahoo.com>]

David Marjanovic (david.marjanovic@gmx.at) wrote:

<Cross-sections of the shaft are available, as the shafts are preserved as
impressions. AFAIK they are round, and not bigger than normal (should have
written thicker instead of stronger). Cross-sections of the walls are of
course not available... making the whole affair partly untestable, I
fear.>

  While we can know nearly the actual diameter of the shaft, and probably
the shape of the shaft in section, we do not know the compositional
anatomy of the walls of the shaft and this is what was needed. Knowing the
shaft was rounded and evenly cylindrical is one thing, but the structure
of the shaft is unknowable at present as only impressions are known, and
not any actual material (unlike in the Jehol material).


=====
Jaime A. Headden

  Little steps are often the hardest to take.  We are too used to making leaps 
in the face of adversity, that a simple skip is so hard to do.  We should all 
learn to walk soft, walk small, see the world around us rather than zoom by it.

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