The Alaskans must use the brief hours of daylight to build vital tools, maintain their land, hunt for needed food, and sharpen their survival skills.

We follow a litter of piglets and show that pigs love mud to keep cool because they have practically no sweat glands and how intelligent they are with a series of puzzles.

Scientists hope that the reintroduction of bears to Europe will have a positive impact on the entire ecosystem, but is Europe ready to coexist with brown bears?

A remarkable discovery is about to uncover secrets hidden for 200 million years; Sir David Attenborough guides us through the story of an ichthyosaur fossil and how this incredible 'sea dragon' lived.

How is an egg made, why are they the shape they are, and why lay an egg at all? Piece by piece, from creation to hatching, Sir David Attenborough reveals the wonder behind these miracles of nature.

Our journey begins in Berlin Grunewald. Along the way, we meet people who are passionate about nature. The journey ends with the Midsummer Festival in the Stockholm Archipelago.

Belgium's streams and rivers are home to countless beavers, cunning grass snakes, and male sticklebacks who build intricate nests and prove to be incredibly dedicated and caring fathers.

Eastern Poland is one of Europe's last wild regions; the Biebrza lowlands make up the biggest national park in Poland and are of the utmost value for beavers, otters and countless aquatic birds.

This episode introduces lions with distinct personalities and follows them as they hunt and explore new territories, but conflict arises when the mothers return with new cubs.

Hunger drives the cubs to violence and family relationships are complicated; the lions rely on the more agile lionesses for hunting and face challenges such as climate change.