From urchins to turtles and from corals to sharks, reefs sustain a myriad of creatures equipped with special adaptations to thrive in their niche.

Never-before-seen underwater footage of marine life, seascapes, and animal behaviours of the Great Barrier Reef.

Yellowstone is one of the most powerful supervolcanoes on Earth; what would the consequences if it erupted? Leading experts show us the different possible scenarios of a Yellowstone super eruption.

The worst earthquake in almost a century strikes Ecuador. Meanwhile, Indiana suffers one of its worst ever tragedies as a storm blows down the main stage during a festival.

Sharks are seen as ocean killers, but are they? Rodolphe Guignard dives with them in Florida and the Bahamas while revealing surprising interactions and questioning if coexistence is possible.

America's mighty Mississippi is under threat from alien invaders, toxic run-off, and massive man-made disruptions. Jeremy meets spirited Americans who want to fix the river's problems.

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.

Never-before-seen underwater footage of marine life, seascapes, and animal behaviours of the Great Barrier Reef.

Yellowstone is one of the most powerful supervolcanoes on Earth; what would the consequences if it erupted? Leading experts show us the different possible scenarios of a Yellowstone super eruption.

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.

Irma, a category five hurricane, devastates the Caribbean. In Fiji, a carer battles catastrophic floods to reach children at an orphanage.

America's mighty Mississippi is under threat from alien invaders, toxic run-off, and massive man-made disruptions. Jeremy meets spirited Americans who want to fix the river's problems.

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.

Never-before-seen underwater footage of marine life, seascapes, and animal behaviours of the Great Barrier Reef.

Sharks are seen as ocean killers, but are they? Rodolphe Guignard dives with them in Florida and the Bahamas while revealing surprising interactions and questioning if coexistence is possible.

America's mighty Mississippi is under threat from alien invaders, toxic run-off, and massive man-made disruptions. Jeremy meets spirited Americans who want to fix the river's problems.

In the Arctic, the search for water, firewood, and other vital resources is a never-ending quest. It requires Alaskans to explore remote locations unfit for normal human existence.

As summer arrives, supersize sea snails try to fend off an invading gang of coral-hungry starfish and more.

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.

In the Arctic, the search for water, firewood, and other vital resources is a never-ending quest. It requires Alaskans to explore remote locations unfit for normal human existence.

Irma, a category five hurricane, devastates the Caribbean. In Fiji, a carer battles catastrophic floods to reach children at an orphanage.

America's mighty Mississippi is under threat from alien invaders, toxic run-off, and massive man-made disruptions. Jeremy meets spirited Americans who want to fix the river's problems.