What makes a mammal a mammal? The answer is more complicated than you think!I, Mammal is a history of mammals and their ancestors and of how science came to grasp mammalian evolution. After a misdirec
A list of the attributes that define a mammal is a ragbag of things--fur, live birth, three bones in the middle ear, a brain whose two halves are robustly joined together . . . But this curious collec
