Swallowed by a Sinkhole | Horizon

1: Avalanche | Dangerous Earth

Dr Helen Czerski looks at the anatomy of an avalanche. From shocking eyewitness footage from within an avalanche to detailed CT scans showing ...

1: Building Britain | Britain Beneath Your Feet

Dallas Campbell reveals how we can only understand the world around us by discovering the hidden wonders beneath our feet.

1: Deep Time | Men of Rock

Iain Stewart tells the story of James Hutton, the founding father of geology. This Scottish thinker overturned ancient beliefs about how and when ...

1: Three Billion Years in the Making | British Isles: A Natural History

Alan Titchmarsh travels Britain to discover why our islands are so diverse, peeling back the layers o...

2: Deserts, Dinosaurs and Volcanoes | British Isles: A Natural History

Alan Titchmarsh uncovers how the British Isles were formed and looks back to a time when dinosaurs roa...

2: Moving Mountains | Men of Rock

Iain Stewart finds out how gung-ho geologist Edward Bailey discovered that Scotland was once home to super volcanoes. Plus the story of uns...

3: The Big Freeze | Men of Rock

In the final episode of the series, Iain Stewart finds out about daredevil scientist Louis Agassiz, who first imagined the world had been gri...

4: Highlands | The Great British Countryside

Hugh Dennis and Julia Bradbury are in the Highlands of Scotland, Britain's wildest and oldest landscape. They explore a landscap...

5: Human Planet | How Earth Made Us

Series in which Professor Iain Stewart looks at how geology has shaped human history. He explores the newest force, humans, whose impact ...

Beneath the Yorkshire Dales | The Great British Countryside

Hugh Dennis ventures into Gaping Gill, a cave produced by limestone erosion.

Chalk cliffs | The Great British Countryside

High Dennis climbs the chalk cliffs on the South East coast of England.

Cliffhanger | Men of Rock

Dr Iain Stewart climbs a coastal sea stack and explains its geology.

Coastal Erosion | From Above

Crumbling into the sea - the Isle of Wight, from above.

Dartmoor granite tors | The Great British Countryside

Hugh Dennis explains the geological processes that caused the granite tors on Dartmoor.

Disruption to the ice age cycle | How Earth Made Us

Professor Iain Stewart explains how humans prevented the next stage of the ice age cycle.

Geology of the North and South Downs | The Great British Countryside

Geological demonstration of how the North and South Downs were created over millions of years.

Geology of the Yorkshire Dales | The Great British Countryside

Julia Bradbury explores the geology of the limestone pavement in the Yorkshire Dales.

Giant Ravines | From Above

Giant ravines are swallowing whole neighbourhoods. Watch the dramatic impact from above.

Hardraw Force | The Great British Countryside

Hugh Dennis visits a waterfall in the Yorkshire Dales that has created a gorge in the landscape.

Hinduism in Bali | Journeys into the Ring of Fire

Iain Stewart tours the Pacific Rim to discover how the rocks beneath our feet have shaped history. He visits awesome volcan...