Random fact I found on Wikipedia today: apparently marsupials are less likely to contract rabies because they have a slightly lower body temperature than placental mammals (35°C vs. 37°C or so).

Only reason why I searched for this is that we’ve got a possum trap setup at work and someone asked if one could get rabies from a possum bite. I’m pretty sure rabies is not really a major problem here in Australia, but it’s interesting to know that marsupials are naturally more resistant to it for this reason (not that I’d be interested in testing this out myself).