10/10 A look at the similarities and differences between humans and other mammals.
9/10 A look at monkeys, including Venezuelan red howlers and Costa Rican capuchin monkeys.
8/10 David Attenborough studies tree dwellers, mammals which have adapted to a life at height.
7/10 David Attenborough looks at marine mammals that have returned to the sea.
6/10 David Attenborough looks at omnivores, animals that eat whatever is around at the time.
5/10 David Attenborough looks at carnivores, from Arctic foxes to big cats.
4/10 Looking at rodents, who possess incisor teeth with chisel-sharp enamel on the front edge.
3/10 David Attenborough looks at some of the biggest predators on earth who prey on plants.
2/10 David Attenborough looks at the mammals that hunt insects.
1/10 David Attenborough visits Australia and South America to study the lives of marsupials.