As President Trump takes office, Katty Kay in Washington and Christian Fraser in London report on the events that are shaping our world.

Michaela Strachan and Steve Leonard present a series featuring orphaned and rescued orangutans in Borneo. They help three babies learn how to behave like wild orangutans. Show more

Richard Fortey travels to Madeira to examine what happens to a volcanic island as it nears the end of its life cycle and starts sinking back into the sea. Show more

Series exploring the Celts looks at the golden age of the La Tene Celtic warrior. But by the middle of the first century BC, the Celts were under threat from the Roman Empire. Show more

Adam Nicolson uses newly found 17th-century manuscripts to tell the story of how arguably the greatest work of English prose ever written, the King James Bible, came into being. Show more

Horizon follows the astronomers pushing the limits of science and engineering with a new generation of supertelescopes in the hunt for mysterious objects in the universe. Show more

Dan Cruickshank visits Britain's finest country houses, museums and factories as he uncovers the 18th- and 19th-century fascination with silver. Show more

Series exploring the Celts looks at the golden age of the La Tene Celtic warrior. But by the middle of the first century BC, the Celts were under threat from the Roman Empire. Show more

Richard Fortey travels to Madeira to examine what happens to a volcanic island as it nears the end of its life cycle and starts sinking back into the sea. Show more

Modern British architects such as Richard Rogers, Terry Farrell and Norman Foster reveal the stories behind some of their most famous creations of the 1980s. Show more