Cold hearts beat with a raging hot fury in a frozen world of snow, icy waters and extreme wind chill; from snow leopards to polar bears, these fighters battle it out with each other.

It's the end of the Kimberley's hot season. As Wilakarra, the rainy season, returns and revives the Martuwarra/Fitzroy River, Nyikina man and actor Mark Coles Smith goes to explore its remote reaches.

The San Andreas Fault is the junction point of two tectonic plates stretching across San Francisco and Los Angeles; it is 1,300km long and currently the most surveyed phenomenon in the world.

Heatwave Lucifer burns though Europe, triggering some of the worst wildfires in Portugal's history, while a Mojave mudslide traps motorists in a raging torrent of sludge.

Hot weather can sometimes be a killer; in the Sonoran Desert, temperatures peak at 80 degrees Celsius and it's so hot that creatures choose to live and hunt in the night.

Jeremy heads to half-forgotten wetlands to come face to face with one of South America's greatest freshwater fighters as he uncovers the slasher stalking Argentina's River of Blood.

Mother Nature governs the unwritten codes of survival that dictate the way of life in rural Alaska. At each camp, the residents face challenges securing basic necessities of life.

It's the end of the Kimberley's hot season. As Wilakarra, the rainy season, returns and revives the Martuwarra/Fitzroy River, Nyikina man and actor Mark Coles Smith goes to explore its remote reaches.

The San Andreas Fault is the junction point of two tectonic plates stretching across San Francisco and Los Angeles; it is 1,300km long and currently the most surveyed phenomenon in the world.

Mother Nature governs the unwritten codes of survival that dictate the way of life in rural Alaska. At each camp, the residents face challenges securing basic necessities of life.

A record breaking twister rips through the city of Tuscaloosa. A couple of students have a terrifying close encounter and the city hospital is swamped by hundreds of casualties.

Jeremy heads to half-forgotten wetlands to come face to face with one of South America's greatest freshwater fighters as he uncovers the slasher stalking Argentina's River of Blood.

Mother Nature governs the unwritten codes of survival that dictate the way of life in rural Alaska. At each camp, the residents face challenges securing basic necessities of life.

It's the end of the Kimberley's hot season. As Wilakarra, the rainy season, returns and revives the Martuwarra/Fitzroy River, Nyikina man and actor Mark Coles Smith goes to explore its remote reaches.

Hot weather can sometimes be a killer; in the Sonoran Desert, temperatures peak at 80 degrees Celsius and it's so hot that creatures choose to live and hunt in the night.

Jeremy heads to half-forgotten wetlands to come face to face with one of South America's greatest freshwater fighters as he uncovers the slasher stalking Argentina's River of Blood.

The Hailstones hunt for springtime waterfowl, and welcome a new addition to the family. Andy must also protect his property from the breaking ice on the Yukon River.

In the season of Koolawa, thousands of migratory birds fatten up on the world's richest intertidal mudflats. And the cool dry season of Barrkana brings humpback whales to near-pristine coastal waters.

In the heart of France there are more than 80 volcanoes. Humanity has often benefited from being near volcanoes. But the risk is always that an eruption could occur at any time without warning.

The Hailstones hunt for springtime waterfowl, and welcome a new addition to the family. Andy must also protect his property from the breaking ice on the Yukon River.

A record breaking twister rips through the city of Tuscaloosa. A couple of students have a terrifying close encounter and the city hospital is swamped by hundreds of casualties.

Jeremy heads to half-forgotten wetlands to come face to face with one of South America's greatest freshwater fighters as he uncovers the slasher stalking Argentina's River of Blood.