Mammals have ways of giving birth that they don't understand

Despite laying eggs and other adaptations that we associate more with non-mammals,like the duck-bill platypus's webbed feet,bill,and the venomous spur males have on their feet,they are, in fact, mammals.That's because they share the defining characteristics of mammalia and are evolutionarily linked to the rest of the class.Whether placental,marsupial,or monotreme,each of these creatures and its unique birthing methods, however bizarre,have succeeded for many millennia in bringing new life and diversity into the mammal kingdom.