aussie gliders

["Nicholas R. Longrich" <longrich@phoenix.Princeton.EDU>]

        I don't really want to open up the whole origin of birds things 
again, but I was reading a book my younger brother got for christmas and 
it made a couple of interesting comments. One was on the feathertail glider, 
a marsupial glider. The tail has on either side, a row of stiffened hairs 
that give the tail the featherlike appearance. One would think 
Archaeopteryx ancestors might have had something similar. The other was 
that the book claimed not one, not two, but THREE separate evolutions of 
gliding among marsupials.