eyeteeth: Their cousin called monotreme
"Monotremes are really weird. Everything about them seems to have been thought up past some kind of deadline. Take the method by which they reproduce: after mating, the female lays an egg (echidna) or two (platypus). Then she carries them around until they hatch. Monotremes are mammalian, even if what they have is a kind of free demo version of mammalianism without the really useful features like live birth, so they lactate. But they have no nipples. The milk just leaks right out of glands in their skin, and the baby monotreme laps it up with sweeps of its tiny bill."
- posted by Sophont @ Tuesday, September 13, 2005