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For decades, scientists have known that platypuses and echidnas – Australia’s unique egg-laying mammals – have another developmental quirk: they don’t use the same genetic toolkit as other mammals to ...

A Erin Flynn, conservation education curator at Henry Vilas Zoo in Madison, Wis.: Mammals such as giraffes, bears, humans and many more are vertebrate animals, meaning they have spines. They’re also ...

Discover the complete list of egg-laying mammals, known as monotremes. Learn about the unique biology of the platypus and the four species of echidnas. Monotremes are a class of mammals that are known ...

Points out that mammals, including the anteater and seal, have hair and nurse their young. Shows representative members of mammalian groups - carnivores, rodents, ungulates, marsupials and primates.