Cross reference: Marsupial Dominance Hierarchies Marsupial (Goog) http://en.wikipedia.org/wiki/Marsupial Marsupial Mammals (Goog) http://www.ucmp.berkeley.edu/mammal/marsupial/marsupial.html Natural History of Marsupials (Goog) http://www.talkorigins.org/faqs/marsupials.html Marsupials & Placentals: Convergent Evolution (Goog) http://www.pbs.org/wgbh/evolution/library/01/4/pdf/l_014_02.pdf |