Le Mythe de l'Atlantide

Set in three of the most seasonally changeable landscapes on earth - Svalbard, Okavango and New England - this series showcases the stunning transformations that occur each year, revealing the unique processes behind them and showing how wildlife has adapted to cope with the changes.

Following his visit to the Great Barrier Reef in 1957, naturalist and broadcaster David Attenborough returns and uses the latest filming techniques to unlock the secrets of the natural wonder.

Before man ruled the world, Earth was a land of giants, from birds with plane-length wingspans to Boeing 737- sized dinosaurs. Count down the biggest beasts in this spectacular special.