BBC Earth HD

Gregg Wallace explores the largest bicycle factory in Britain, which produces 150 folding bicycles every 24 hours, and joins a multi-stage manual production line to make his very own bike.

At the very end of East Africa's Great Rift Valley, there's a "land that time forgot" ; the rolling grasslands of the Luangwa Valley.

The remarkable story of how the Hubble Space Telescope has revealed the awe and wonder of our universe.

Uncovering surprising undersea relationships and connections as sharks befriend fish and whales play with dolphins.

The mercury drops, but things heat up for Hope; an elusive creature is caught on tape; an impaled gull inspires a dramatic rescue.

Nova Scotia's Southern coast.

As seen from space, a crater in Turkmenistan, is on fire; drones reveal perfect circles in the Namibian desert; A puzzle is solved by a World War 2 code breaker; Mystery of Death Valley's self-moving stones; Utah's strange electric blue ponds.

Hope revisits a completely rebuilt rehab and reveals new plans; Hope and Barry discover a problem plaguing massive marine mammals.

The Eastern Coastline is a living historical record of the battle between the French and English.

A remote island linked to one of the world's most famous aviation mysteries; thousands of shipwrecks in the Bermuda triangle; a history lost and found in the South Pacific; a 10,000-year-old mystery in the murky depths of the Yucatan Peninsula.

Exploring the worst mass extinction the planet has ever seen, when as much as 90% of all species died 252 million years ago; this moment in Earth's history took life to the brink, wreaking havoc and destruction on an unprecedented scale.

Earth's journey into the deep freeze starts with fire over 800 million years ago when long before the age of the dinosaurs, before there was even animal life, the giant supercontinent Rodinia breaks up.

The story of how plant life turned Earth from a barren rock into a vibrant green world; a four-billion year saga of highs and lows that almost wiped out all life on the planet.

When Earth first formed from clouds of dust and gas 4.6 billion years ago, it was devoid of an atmosphere, an inhospitable rock floating in the black void of space.

How dramatic twists in Earth's story enabled humans to go from being part of nature to controlling it.

A look at Isaac Newton;a visit to CERN.

Brian explores the sun's rule over every world in the solar system.

Without volcanoes, life on Earth would never have begun; they are responsible for both the planet's breathable atmosphere and the oceans; mineral-rich ash from regular eruptions fertilize the land.

Brian explores the sun's rule over every world in the solar system.

Without volcanoes, life on Earth would never have begun; they are responsible for both the planet's breathable atmosphere and the oceans; mineral-rich ash from regular eruptions fertilize the land.

Gregg Wallace lends a hand unloading a tanker of sugar, and follows its path through a factory to learn how the workers transform it into sweets.

Journey from the lava ramparts to its fiery heart, discovering how this place became one of the most important areas of biodiversity in the world.

The incredible story of how Pluto has been propelled from an unremarkable ball of ice on the edge of the solar system to a world of unimaginable complexity; one where some form of alien life might even exist.

From a baby whale in danger to marine iguanas battling storms, a look at how animals survive when faced with challenges of the ocean.

The vast and diverse terrain that lies at the border of Canada and the United States.

Japan is home to two of the top five most dangerous volcanoes on the planet.

For people who live on active volcanoes, life has an element of impermanence to it.

Revealing the masterpieces that about in the universe.

Hubble's Canvas reveals the masterpieces that abound in the universe.

Nubian pyramids reveal the rise of female power in Ancient Kush; a shocking satellite image uncovers secrets of an ancient ancestral Puebloan site in New Mexico.

British comedian and travel enthusiast Griff Rhys Jones explores the prairies and vast sprawling plains of both Saskatchewan and Alberta provinces.

The cubs' mother loses patience as they learn to hunt on their own.

A look at the extraordinary riches and wonders of the polar regions and the people that have been visiting them for thousands of years.

Borneo is the richest rainforest island of all; home to 40,000 species of plants and animals, 6,000 of them are unique, and more are discovered almost daily.

The Namib Desert is one of the oldest deserts of all; it's also one of the most diverse; with 50-degree temperatures and half a millimetre of rainfall annually.

At the very end of East Africa's Great Rift Valley, there's a "land that time forgot" ; the rolling grasslands of the Luangwa Valley.

Journey from the lava ramparts to its fiery heart, discovering how this place became one of the most important areas of biodiversity in the world.

Gregg Wallace goes to a historic factory in Germany that produces 600,000 pencils a day; at materials intake, he is astonished that the main material in a pencil is not lead but graphite; he helps mix this with clay to produce a 250-kilo batch.

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.

From the bone-dry deserts of the Atacama, where penguins weave their way through a minefield of snapping sea lions, to the lush cloud forests of the Andes, South America is full of unusual and ingenious wildlife.

Explorers head to Greenland in the Arctic, where they kayak through the world's largest fjord during the spring melt -- the most dangerous time of the year.

From the bone-dry deserts of the Atacama, where penguins weave their way through a minefield of snapping sea lions, to the lush cloud forests of the Andes, South America is full of unusual and ingenious wildlife.

Explorers head to Greenland in the Arctic, where they kayak through the world's largest fjord during the spring melt -- the most dangerous time of the year.

Helen Czerski reveals how life began when hot met cold, and how every single living creature on Earth depends on temperature for its survival; she witnesses the remarkable surgery that uses temperature to push the human body to the brink of life.

Dr. Helen Czerski reveals how the harnessing of heat's power to transform matter has led to some of humanity's greatest achievements, from molten metal that enabled us to make tools to the searing heat of plasmas that offer near unlimited power.

Meeting the scientists, entrepreneurs, and tech wizards at the heart of the global metamorphosis of 5G; learning how blazing-fast wireless connections will transform home and work; getting a peek at futuristic devices and services.