Mammals are a class of warm-blooded vertebrates that have hair or fur, produce milk to feed their young, and have a more complex brain than other animals:
Mammals feed their young milk.
They can be furry or hairy.
They regulate their body temperature.
Sir David Attenborough has presented many documentaries about animals, including series and episodes that explore a range of topics:
Mammals
A BBC series that explores the world of mammals, from the Etruscan shrew to the blue whale
Dynasties
A five-part series that follows the lives of endangered species, including chimpanzees, emperor penguins, lions, painted wolves, and tigers
David Attenborough's Rise of Animals
A series that uses CGI graphics and natural history footage to explore how animals came to be