Mammals
Ever wonder what makes a mammal a mammal?! Well, for one thing, mammary glands! Only mammals have them, and they use them to feed their young!
Animals in the class Mammalia also have hair, and give birth to live young, except for the echidna and platypus, who are the only mammals to lay eggs!
Animals in the class Mammalia also have hair, and give birth to live young, except for the echidna and platypus, who are the only mammals to lay eggs!
