TravisandJill, you are right that God can do anything. But don’t invoke miracles if you are insisting on a naturalistic explanation for the flood and ark story. If God could materialize marsupials in Australia instantaneously, God could also suspend them above the sea for 150 days and dispense with the ark altogether. If you do insist on a literal interpretation of the Noah story, you must account in literalistic terms for all its aspects, not invoking miracle when it suits you.
If you interpret it literally, you have to account for how kangaroos, koalas, wallabies, echidnas, and platypuses swam thousands of miles across open ocean to Mesopotamia, without any food, in order to reach Noah’s ark. You also have to account for how the animals got back to every continent on the flood-devastated earth devoid of vegetation appropriate to their digestive requirements. Remember, if you opt for a literal interpretation, you cannot suddenly invoke a miracle to explain those bits of the story you find inconvenient, because then you are no longer interpreting it literally.
StAnastasia