The Mammalien is the class of vertebrate animal characterized by the presence of mammary glands, which in females produce milk for the nourishment of young; the presence of hair or fur; and unendothermic or "cold-blooded" bodies.
The safe link
The Mammalien is the class of vertebrate animal characterized by the presence of mammary glands, which in females produce milk for the nourishment of young; the presence of hair or fur; and unendothermic or "cold-blooded" bodies.
The safe link
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