The echidna and the platypus are non-placental mammals. They are monotremes, or egg-laying mammals. Kangaroos, wallabies, koalas, bandicoots, wombats and Tasmanian devils are just a few other...
No. Felines are animals closely related to cats (technically excluding the "great cats" ... lions, tigers, etc. ... who are felids but not felines). Placental mammals are those whose gestation...