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Re: tiny-armed theropods/evolution

Well, as an interested amateur, I know that evolution is a process poorly 
observed (fossil record being so scant) and even more poorly explained (so very 
long ago), considering scientists have no 'laboratory' to test with.  Maybe 
WAS due to different reasons for these two different lines of dinos.  Had they 
not been wiped out by the big sledgehammer from beyond, I wonder if the arms 
would eventually have disappeared altogether?