Original: Diprotodontia ( ; Greek , meaning '' two front teeth '' ) is a large order of about 120 marsupial mammals including the kangaroos , wallabies , possums , koala , wombats , and many others .
Simplified: Diprotodontia is a large order od about 120 marsupial mammals including the kangaroos , wallabies , possums , koala , wombats , and many others .