How the Highlands' moorland and forest are both crucial to their wild inhabitants.
Steve Backshall discovers kangaroos, the world's most venomous snake and a burrowing toad.
Steve Backshall plumbs the ocean depths to find an array of bizarre creatures.
Steve Backshall looks for the answer to a puzzle involving wolves and beavers.
Steve Backshall looks at life in the oldest desert in the world, the Namib in Africa.
Steve finds out how a tiny coral building block created Earth's largest living structure.
Why Canada's coastal forest is home to top predators like eagles, bears and wolves.
Steve Backshall unravels the secrets that lie covered in ice for most of each year.
Steve Backshall reveals the secret to the existence of the world's largest inland delta.
Steve Backshall looks at the unique geography of California's Monterey Bay kelp forest.
A look at intricate relationships and unexpected hardship in the Amazon rainforest.
What is the key to the Serengeti that allows such density and diversity of herbivores?
How did the unique wildlife of the Galapagos get there and what allows them to thrive?