That's a good analogy, Robyn. wish I'd thought of that one.

For me the most interesting fact about kangaroos and wallabies is the size of the babies when they are born. The kangaroo baby is only about an inch long and looks more like an embryo and crawls up to the pouch (ain't instinct a wonderful thing) and stays there until it fully develops. I've seen this on tv - this tiny thing that looks more like a leech than a mammal crawling up the belly of the mother into the pouch. Amazing. This is why they are called marsupials, because of the pouch.

Helen