BBC Earth

David Attenborough examines the chameleon's tongue and the giraffe's neck.

Ben travels to Sweden to meet Annalisa, the Italian chose a life on the streets of Europe as a teenager, and now is developing a forest hideaway on the fringes of Swedish society for her and her toddler.

A fierce winter storm threatens Sue's all important fuel supply, and Erik struggles to capture a thieving wolf.

Andrew and Gayle’s baby boy arrives amidst the busy summer season, the dairy shed build takes its toll on Adam’s leg, and Ally and his crofting pals shear sheep on a remote island.

Sue Perkins enjoys a night out with Kyoto's geishas, goes free diving with some ama divers and visits Hiroshima. In Tokyo, she explores how the Japanese are tackling the future.

The James Webb Space Telescope will be the space observatory of the next decade when it launches. In addition to investigating the wealth of planets outside of our solar system, the observatory will peer back to some of the earliest galaxies that formed after the Big Bang - and the very structure of the universe.

By the mid-19th century, Japan has been cut off from outside western influence for more than 200 years. In that time the West, and much of the rest of the world, has made extraordinary leaps forward in science, industry and military technology.

Many passionate people are dedicated to saving the wild animals of Asia. These individuals and their ingenious solutions give us hope and optimism for the future of the continent.

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

Ben travels to Northumberland where he meets Kezz and Nathalie Petronelli-Stone. Their off-grid and environmentally sensitive approach to life means they don't even have a telly.

Anton and Giovanni's Spanish adventure kicks off in Seville. Anton goes back to his roots as the boys explore the Andalusian region of this magnificent country together.

Why do some animals switch their traditional sexual identities?

Uncovering the mystery of where some animals disappear to each year.

An orphaned baby Triceratops, must outwit a deadly T. rex. Can she survive?

As the cold season wanes in the Arctic, winter does not go quietly into the night.

Ben Fogle returns to Bulgaria to meet up with nomads Miriam and Peter after four years.

See how CGI imagery, the latest scientific research and archive footage created the series. In this episode: looking at the sun.

Professor Thilaganathan provides pioneering care to Ann-Marie's twins, who are at risk of dying, and Becky's unborn baby, who has a rare lung tumour, and closely monitors Randika's pregnancy.

Christine prepares for the island's biggest dog sled race. Doctor Martin Eckhardt explains how his small team have dealt with frost bite, polar bear attacks and emergency rescues.

Anton and Giovanni's Spanish adventure kicks off in Seville. Anton goes back to his roots as the boys explore the Andalusian region of this magnificent country together.

Lucy plunges further into the unknown reaches of the Amazon, coming face to face with hostile giant wasps, caiman-infested rivers, and more deadly snakes.

Why do some animals switch their traditional sexual identities?

Uncovering the mystery of where some animals disappear to each year.

As the cold season wanes in the Arctic, winter does not go quietly into the night.