Dr Stewart reveals how rocks inspired the Egyptians to build pyramids and the Romans to build perfect circles.
Dr Iain Stewart reveals how earthquakes have created a network of cracks in the ground.
A giant comet heading for Earth is destined to mark the end of the age of the dinosaurs.
Follow a group of plant-eating dinosaurs as they try to survive in an extreme climate.
Fly with a pterosaur on a journey of thousands of miles to his breeding grounds.
Meet the liopleurodon, the biggest of all the carnivores 149 million years ago.
How discoveries in the 18th century overturned ideas of when and where civilization began.
Richard Miles explores how archaeology began by trying to prove a biblical truth.
In the last of the series, Richard Miles examines the rise and fall of the Roman Empire.
Archaeologist and historian Richard Miles examines the phenomenon of the Roman Republic.
Richard Miles traces the battle-scarred career of Alexander the Great.
Richard Miles explores the power and the paradox of the 'Greek Thing'.
David Attenborough explores why dinosaurs vanished while reptiles like crocodiles and turtles survived.
A look at the scientific work which went into the reconstruction of Big Al the Allosaurus.
In 1991, scientists discovered a perfectly preserved Allosaurus body and named him Big Al. This is his story.
Nigel Marven is on the trail of the dinosaur with the biggest claws of all time.
Computer animation is used to simulate dinosaurs in a walk alongside the biggest ones that ever lived.
Investigating the Yeti - the world's most famous mystery animal.
The earth split in India 66 million years ago in a disaster that may have caused the end of the dinosaurs.
David Attenborough investigates the discovery of a giant dinosaur find in Argentina.