It does for Koala's. There's probably better articles. This was the best of a bad lot on a quick search: http://www.abc.net.au/news/2007-10-10/scientists-disco

It does for Koala's. There's probably better articles. This was the best of a bad lot on a quick search: http://www.abc.net.au/news/2007-10-10/scientists-discover-true-function-of-appendix-organ/693946 http://www.abc.net.au/news/2007-10-10/scientists-discover-tr...