Following the episode on Australia, Professor Iain Stewart uncovers the anatomy of American alligators and how North and South America were created.
The New World was torn from the heart of an ancient supercontinent - the Old World of Pangaea.
Mekong - The Jahan
A stunning new luxury boutique-style river cruiser.
Antarctic - Fly and Cruise to Antarctica
Antarctic Peninsula in 6 days from £5,425 per person.
View other offers