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Dear paleonetters,
sorry that I must make this statement, however,
fossil hunters and paleontologists are very restricted concerning their
abilities to determine the origin of flight. They only can derive their
tales (sensu Steven J. Gould) from fossil remainders, but they cannot see
the problems restricting an evolutionary path or making it entirely impossible.
An evolution is never accidental, and it is an old and erroneous myth that
flight is either possible from ground to air or from trees to ground,
unfortunatety completely ridiculous. Fossil remainders per se
cannot reveal unequivocally evolutionary lines, though of course they
are not in contrast to the truth. Physical conditions clearly dominate any
evolution and must be taken into account to arrive at reliable results. As a
experienced expert in aerodynamics and flight mechanics I have done so (www.ebel-k.de). There is a direct
evolutionary line from unidentified aquatic precursors via long-tailed
rhamphorhynchoids to pterodactyloids, as well as in another line to birds via
Archaeopteryx and Alulavis hoyasi.
Klaus
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