BBC Earth

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.

Cyril goes to Senegal to try and catch a marlin with a hand line in the open ocean.

North Africa, 100 million years ago. A Spinosaurus father must embark on a dangerous voyage to feed his babies.

Ash and his team battle rapids, dense jungle and wildlife to uncover the hidden source of the Coppename River.

After swimming out of a dangerous current, Cyril explores the Indian Ocean with local fishermen.

Steve Backshall is taking ten novice divers on one Deadly mission - to dive with sharks in Bimini, the shark capital of the world, with the ultimate goal being to qualify as scuba divers.

Some of the team explores the mangroves, which are essential for the survival of some sharks. While there, they come face to face with baby lemon sharks.

Actor Mark Benton joins Robson on a Scottish road trip to East Lothian. Robson introduces Mark to bird watching, cookery and highland games. The pair stay in a double-decker bus.

Robson joins up with Sheli McCoy, aka Gladiator Sabre, to explore Fife. They take a paddleboard tour of the coast, stay on a farm overnight and make a boat trip to the Isle of May.

The largest of all of Earth's displays stretches across thousands of kilometres in the night sky: the Aurora Borealis. The arctic wilderness of Northern Sweden is one of the best places to see it.

After swimming out of a dangerous current, Cyril explores the Indian Ocean with local fishermen.

Some of the team explores the mangroves, which are essential for the survival of some sharks. While there, they come face to face with baby lemon sharks.

Actor Mark Benton joins Robson on a Scottish road trip to East Lothian. Robson introduces Mark to bird watching, cookery and highland games. The pair stay in a double-decker bus.

Robson joins up with Sheli McCoy, aka Gladiator Sabre, to explore Fife. They take a paddleboard tour of the coast, stay on a farm overnight and make a boat trip to the Isle of May.

The largest of all of Earth's displays stretches across thousands of kilometres in the night sky: the Aurora Borealis. The arctic wilderness of Northern Sweden is one of the best places to see it.

Ash and his team battle rapids, dense jungle and wildlife to uncover the hidden source of the Coppename River.

North Africa, 100 million years ago. A Spinosaurus father must embark on a dangerous voyage to feed his babies.

Steve Backshall is taking ten novice divers on one Deadly mission - to dive with sharks in Bimini, the shark capital of the world, with the ultimate goal being to qualify as scuba divers.

Some of the team explores the mangroves, which are essential for the survival of some sharks. While there, they come face to face with baby lemon sharks.

Actor Mark Benton joins Robson on a Scottish road trip to East Lothian. Robson introduces Mark to bird watching, cookery and highland games. The pair stay in a double-decker bus.

Robson joins up with Sheli McCoy, aka Gladiator Sabre, to explore Fife. They take a paddleboard tour of the coast, stay on a farm overnight and make a boat trip to the Isle of May.

Ash and his team battle rapids, dense jungle and wildlife to uncover the hidden source of the Coppename River.