From the highest mountains to the deepest rivers, Sir David Attenborough guides us through the natural world as it unravels throughout the four seasons, with the daily struggle for survival in Earth's most extreme habitats.
Natural history has come to Yesterday. Watch it throughout the Easter weekend.
Have a look at some photos from Planet Earth, the show that needs no introduction.
Planet Earth is the spectacular series that took five years to make, involved 40 cameramen and was filmed in 200 locations.
Find out all about the early days of Sir David's incredible career.