Have an (o)possum fact: they have odd numbers of nipples! Virginia opossums have 13, but the shrewish short-tailed opossum can have up to 27.
Despite Guinness giving the award to opossums, there may be an even nipplier animal: the tailless tenrec has up to 36!
(Note the "up to" in both of these. Mammals tend not to have entirely consistent numbers of nipples. This very much includes humans. Third and fourth nipples are actually super common in humans, but in most cases they're smaller than the main two and don't have accompanying breast tissue, so they just look like weird moles. A good hint that your bump might be an extra nipple is if it occurs on one of the "milk lines" that run down each side of your body from your armpit to your groin.)
