One of the world's best known animal researchers surveys the results of more than three decades of painstaking study in Jane Goodall's Wild Chimpanzees.

NATURE's "The Reptiles: Turtles and Tortoises" takes a close look at ancient creatures marching slowly through the millennia.

Marmosets and Tamarins are the world's smallest monkeys. These animals, some never seen before, are the subject of Gremlins: Faces in The Forest.

Marmosets and Tamarins are the world's smallest monkeys. These animals, some never seen before, are the subject of Gremlins: Faces in The Forest.

Marmosets and Tamarins are the world's smallest monkeys. These animals, some never seen before, are the subject of Gremlins: Faces in The Forest.

Marmosets and Tamarins are the world's smallest monkeys. These animals, some never seen before, are the subject of Gremlins: Faces in The Forest.

Marmosets and Tamarins are the world's smallest monkeys. These animals, some never seen before, are the subject of Gremlins: Faces in The Forest.

Childhood may be the most important part of our lives, the time when we learn the skills that will help us survive for the rest of our years.

Both humans and animals seem to be hard-wired to find youngsters adorable. Baby Tales explores the reasons why the young play on our heart strings.

TOOTHWALKERS presents extremely rare under-the-ice footage that reveals a complex and potentially dangerous side to this huge and often mysterious mammal.