BBC Earth

David Attenborough examines the narwhal's tusk and the spiral shells found on snails.

Ben goes to New Zealand and spends time with a hunter-gatherer couple who have raised two teenagers in complete isolation.

Ricko DeWilde teaches his children to survive in the wild as they journey to Huslia. Sue Aikens updates her camp to improve her comfort.

Michael ventures to the northernmost reaches of Europe, where he braves the freezing temperatures of the Baltic Sea and finds peace paddling a canoe on the lakes of Finland.

Discussion about the impact grasslands have on capturing carbon.

Asia is the most mountainous continent on earth.From the tropical south to its barren centre, its highest places are home to some of our planet's most remarkable wildlife.

Gregg explores a factory in Grimsby that produces 80,000 fish fingers every day.He discovers that cod arrives at the factory as compressed blocks of frozen fish which are cut into finger shapes.

Michael heads for the Netherlands, where he roots around the world's largest flower auction in Haarlem, operates a crane in Europe's largest container port, Rotterdam, and investigates Amsterdam.

In Kavik, Sue looks for rabbits before the sun sets for the long dark winter. Johnny, traps with a rabbit hide.Avery and his brother Gage, experience a white-out.

Ben Fogle returns to meet his previous contributors who set up home in remote locations.In this episode, he returns to see the Owens in the Yorkshire Dales.

Science documentary looking at how forest ecosystems reduce global carbon levels and effect climate.

Asia is the most mountainous continent on earth.From the tropical south to its barren centre, its highest places are home to some of our planet's most remarkable wildlife.

The struggle for survival in Alaska continues for Sue, Jessie, Glenn and the Hailstones.

Ben hunts rattlesnakes and meets eccentric desert folk with a former fashion photographer who ditched his New York mansion for the Texan wilderness.

Ben travels to a unique, tiny island in the Scottish Hebrides where he meets ex-social care worker Philip, who has embraced a new way of life in this small, alternative community.

In the remote reaches of Asia's frozen north, creatures must overcome unique challenges, finding exceptional ways to thrive in a hostile world that pushes life to its very limits.

Deep in the Egyptian desert, British archaeologist Howard Carter and his team slowly peel the bandages off Tutankhamun. It takes six days.Original photographs and Carter's extensive diary entries recreate the historic moment - the only royal burial found intact.

Clive Myrie meets soon-to-be-grandmother Tracey and suggests to her that borrowing a pet might lower her blood pressure.

Zoe Ball prescribes ten minutes of sunshine a day for retired woodworker Neville, who has suffered a series of heart attacks.

The struggle for survival in Alaska continues for Sue, Jessie, Glenn and the Hailstones.

Ben hunts rattlesnakes and meets eccentric desert folk with a former fashion photographer who ditched his New York mansion for the Texan wilderness.

Ben travels to a unique, tiny island in the Scottish Hebrides where he meets ex-social care worker Philip, who has embraced a new way of life in this small, alternative community.

In the remote reaches of Asia's frozen north, creatures must overcome unique challenges, finding exceptional ways to thrive in a hostile world that pushes life to its very limits.

The icy adventures continue for the hardy characters living in rural Alaska.