what is sixth grade in UK terms (or an easier answer would be how old were you in sixth grade)
and no i have definately never heard of the word monotremes, though i know the class of mammal you mean.....the platypus lays eggs but it still feeds it's young on milk, it's just that it's whole skin acts like a mammary gland so it basically sweats milk.
and i heard about the marsupials not strictly mammals thing from QI (quiz program on BBC with Stephen Fry) but i did wonder at the time whether it was true because Marsupials definately don't fit into any other category.
As for the Possum, that is interesting i didn't know there were marsupials outside Australasia, is it possible American possums were brought over from Australia?.... ie are there any records of them before things like sailing trips between continents were common?
