The Great Pyramid of Giza, built for Khufu over 4,500 years ago, is the last standing Wonder; exclusive access unveils secret chambers, aiming to unravel its many mysteries.

On the site of Dahshur, south of Cairo, are two revolutionary monuments which seem to be the first real pyramids.

Rumoured to be the cleanest river in Europe, few dispute it's the coldest; cascading down from the Dinaric Alps in Serbia, it soon crosses the border into Bosnia Herzegovina, where marine biologist and fisherman Sanel Riđanović casts for salmon.

Peek at landmarks in places where they shouldn't be; wing your way over an imperial pyramid in the Netherlands, a metal sphere in remote Russia, a lion shape carved into an English hillside and a bare swath cut through an Austrian forest.

Traveling the Dordogne River via traditional boats through the green heart of southwest France; drinking wine and hunting for truffles; riding a luxury cruiser to a lighthouse built for a king.

The second largest planet is also a mini-solar system with 60 moons and those crazy rings.

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Peek at landmarks in places where they shouldn't be; wing your way over an imperial pyramid in the Netherlands, a metal sphere in remote Russia, a lion shape carved into an English hillside and a bare swath cut through an Austrian forest.

Rumoured to be the cleanest river in Europe, few dispute it's the coldest; cascading down from the Dinaric Alps in Serbia, it soon crosses the border into Bosnia Herzegovina, where marine biologist and fisherman Sanel Riđanović casts for salmon.

The story of the greatest tank battle the world has ever seen.

The scale of World War II grows as the United States joins the war; explore the operations where Allied commando troops raid the Norwegian coast.

The North American F-100 Super Saber, also known as the Hun, becomes a supersonic powerhouse after initial difficulties; it was used primarily in the Vietnam War.

Diving into retrofits on the world's only underwater habitat, where NASA astronauts train for space missions; Mike joins a crack repair team who breathe new life into this oceanic environment after a global pandemic shut it down.

The engineering secrets behind the world's steepest mountain railway, a remodeled 145-year-old museum and a futuristic condo.

The Great Pyramid of Giza, built for Khufu over 4,500 years ago, is the last standing Wonder; exclusive access unveils secret chambers, aiming to unravel its many mysteries.

On the site of Dahshur, south of Cairo, are two revolutionary monuments which seem to be the first real pyramids.

The hot, dry extreme center of Australia is home to landscapes like nowhere else on Earth; fearsome apex predators, a town built by opals and Uluru, the cultural and spiritual heart of a nation.

Exhume chilling insights into ancient rituals, legendary warriors, and brutal deaths; investigate dozens of childrens skeletons in Peru, find out if Amazon warriors once lived in Russia, and see what a UK cave full of butchered remains reveals.

Contemplate the strange disappearance and reappearance of the master of macabre, Edgar Allan Poe, just before his death in 1849; explore the chilling rumour that Shakespeares grave was robbed, then chase down thieves who stole the Mona Lisa in 1911.

The hot, dry extreme center of Australia is home to landscapes like nowhere else on Earth; fearsome apex predators, a town built by opals and Uluru, the cultural and spiritual heart of a nation.

Exhume chilling insights into ancient rituals, legendary warriors, and brutal deaths; investigate dozens of childrens skeletons in Peru, find out if Amazon warriors once lived in Russia, and see what a UK cave full of butchered remains reveals.

Contemplate the strange disappearance and reappearance of the master of macabre, Edgar Allan Poe, just before his death in 1849; explore the chilling rumour that Shakespeares grave was robbed, then chase down thieves who stole the Mona Lisa in 1911.

The hot, dry extreme center of Australia is home to landscapes like nowhere else on Earth; fearsome apex predators, a town built by opals and Uluru, the cultural and spiritual heart of a nation.

Exhume chilling insights into ancient rituals, legendary warriors, and brutal deaths; investigate dozens of childrens skeletons in Peru, find out if Amazon warriors once lived in Russia, and see what a UK cave full of butchered remains reveals.

Contemplate the strange disappearance and reappearance of the master of macabre, Edgar Allan Poe, just before his death in 1849; explore the chilling rumour that Shakespeares grave was robbed, then chase down thieves who stole the Mona Lisa in 1911.

The hot, dry extreme center of Australia is home to landscapes like nowhere else on Earth; fearsome apex predators, a town built by opals and Uluru, the cultural and spiritual heart of a nation.

Tackling the grade 6 rapids and untamed waters of the Buller River on the west coast of New Zealand's South Island, blessed by a Māori elder of the Ngāti Apa ki te Rā Tō.

Confront objects that make no sense; spot a spinning island in an Argentinian marsh, a colossal triangle stuck in the Arizona desert, mysterious multicoloured pools across northern Ethiopia and a huge human figure hidden in the Australian outback.

Rumoured to be the cleanest river in Europe, few dispute it's the coldest; cascading down from the Dinaric Alps in Serbia, it soon crosses the border into Bosnia Herzegovina, where marine biologist and fisherman Sanel Riđanović casts for salmon.

The Northern Lights tells the story of the makeup of the planet, the sun and possibly life on other planets.

The second largest planet is also a mini-solar system with 60 moons and those crazy rings.

Confront objects that make no sense; spot a spinning island in an Argentinian marsh, a colossal triangle stuck in the Arizona desert, mysterious multicoloured pools across northern Ethiopia and a huge human figure hidden in the Australian outback.

Tackling the grade 6 rapids and untamed waters of the Buller River on the west coast of New Zealand's South Island, blessed by a Māori elder of the Ngāti Apa ki te Rā Tō.

The scale of World War II grows as the United States joins the war; explore the operations where Allied commando troops raid the Norwegian coast.

Forensic archeologist Caroline Sturdy Colls goes in search of a Nazi SS camp constructed on the British Channel island of Alderney during World War II; clues emerge leading Sturdy Colls to suspect that Alderney was the scene of Nazi mass murders.

The story of the greatest tank battle the world has ever seen.

A different view of the events in the Arctic during World War II, with unknown details; a focus on the struggle of the great powers for control of the area and its natural resources.

Archaeologists investigate the fate of Nero and his buried Golden Palace.

The hot, dry extreme center of Australia is home to landscapes like nowhere else on Earth; fearsome apex predators, a town built by opals and Uluru, the cultural and spiritual heart of a nation.

Exhume chilling insights into ancient rituals, legendary warriors, and brutal deaths; investigate dozens of childrens skeletons in Peru, find out if Amazon warriors once lived in Russia, and see what a UK cave full of butchered remains reveals.

Contemplate the strange disappearance and reappearance of the master of macabre, Edgar Allan Poe, just before his death in 1849; explore the chilling rumour that Shakespeares grave was robbed, then chase down thieves who stole the Mona Lisa in 1911.

A US sub shows unbelievable courage in the face of impossible odds. A look into how a bomb dropped by the Japanese forces pushes the craft into a deadly dive, and ignites a toxic chemical fire that leaves the crew fighting for their lives.

The history of the B-1 Lancer reveals how the Cold War bomber evolved to become one of Americas most effective military aircraft.

By the summer of 1944, the United States is gaining the upper hand in the Pacific War with better training, troop numbers and supply lines; it aims for the heart of Japan's inner defense ring, engaging in a naval battle for Saipan in the Marianas.

A US sub shows unbelievable courage in the face of impossible odds. A look into how a bomb dropped by the Japanese forces pushes the craft into a deadly dive, and ignites a toxic chemical fire that leaves the crew fighting for their lives.

The history of the B-1 Lancer reveals how the Cold War bomber evolved to become one of Americas most effective military aircraft.

By the summer of 1944, the United States is gaining the upper hand in the Pacific War with better training, troop numbers and supply lines; it aims for the heart of Japan's inner defense ring, engaging in a naval battle for Saipan in the Marianas.

A US sub shows unbelievable courage in the face of impossible odds. A look into how a bomb dropped by the Japanese forces pushes the craft into a deadly dive, and ignites a toxic chemical fire that leaves the crew fighting for their lives.

The history of the B-1 Lancer reveals how the Cold War bomber evolved to become one of Americas most effective military aircraft.

By the summer of 1944, the United States is gaining the upper hand in the Pacific War with better training, troop numbers and supply lines; it aims for the heart of Japan's inner defense ring, engaging in a naval battle for Saipan in the Marianas.

A US sub shows unbelievable courage in the face of impossible odds. A look into how a bomb dropped by the Japanese forces pushes the craft into a deadly dive, and ignites a toxic chemical fire that leaves the crew fighting for their lives.

In April 1945, the Yamato, the largest battleship in history, leaves for Okinawa to destroy American warships and prevent their landing; weighing 70,000 tonnes and armed with 150 guns, it faced the U.S.

In May 1905, after a year of stalemate in the Russo-Japanese War, Russia's Pacific squadron arrives at the Tsushima Strait.

On D-Day and later in June 1944, the USS Texas helps silence batteries of German artillery and gun positions defending the landing beaches and the port city of Cherbourg.

Allied convoys resupplying the Soviet Union navigate the Arctic, infested with U-boats and enemy aircraft.

In May 1941, the British Royal Navy relentlessly pursues the formidable battleship Bismarck with the mission to sink it at any cost.

The rise of submarines marks World War II at sea, leading to fierce battles above and below the waves.

Forensic archeologist Caroline Sturdy Colls goes in search of a Nazi SS camp constructed on the British Channel island of Alderney during World War II; clues emerge leading Sturdy Colls to suspect that Alderney was the scene of Nazi mass murders.

A different view of the events in the Arctic during World War II, with unknown details; a focus on the struggle of the great powers for control of the area and its natural resources.

The first invasion of the Italian Campaign of WWII: Operation Husky.

The story of the greatest tank battle the world has ever seen.

The scale of World War II grows as the United States joins the war; explore the operations where Allied commando troops raid the Norwegian coast.

A US sub shows unbelievable courage in the face of impossible odds. A look into how a bomb dropped by the Japanese forces pushes the craft into a deadly dive, and ignites a toxic chemical fire that leaves the crew fighting for their lives.

The first invasion of the Italian Campaign of WWII: Operation Husky.

The scale of World War II grows as the United States joins the war; explore the operations where Allied commando troops raid the Norwegian coast.

A mass uprising that shows the world the truth about the Nazis' secret Sobibor death camp; learn how the Davao Dozen break out of a harsh Japanese penal colony and explore how two plucky German pilots plot to get out of Britain.

With thousands of German soldiers trapped in the Falaise Pocket, a small Canadian tank squadron tries to close off the escape route.

While Nazi Germany attempts to cover up the brutal murders of a serial killer, a brilliant detective uses early forensic methods to bring him to justice.

A mass uprising that shows the world the truth about the Nazis' secret Sobibor death camp; learn how the Davao Dozen break out of a harsh Japanese penal colony and explore how two plucky German pilots plot to get out of Britain.

With thousands of German soldiers trapped in the Falaise Pocket, a small Canadian tank squadron tries to close off the escape route.

An American submarine crew gets an order: to hunt Japanese ships that are conducting a secret VIP evacuation in the Philippines in June 1945; examining the stealthy, dangerous tactics they used that would set a US Navy record.

While Nazi Germany attempts to cover up the brutal murders of a serial killer, a brilliant detective uses early forensic methods to bring him to justice.

With thousands of German soldiers trapped in the Falaise Pocket, a small Canadian tank squadron tries to close off the escape route.

Exploring the final building phase of the Great Pyramid of Giza and the rituals that took place after a pharaoh dies.

While Nazi Germany attempts to cover up the brutal murders of a serial killer, a brilliant detective uses early forensic methods to bring him to justice.

With thousands of German soldiers trapped in the Falaise Pocket, a small Canadian tank squadron tries to close off the escape route.

German U-boats roam the seas in packs, threatening to starve Britain into submission during World War II.

Great Britain faces losing its battle for survival against German U-boats until a new source of intelligence turns the tide in 1941.

The German U-boat hunters become the hunted as advances in technology turn the tide in the Allies' favor.

An American submarine crew gets an order: to hunt Japanese ships that are conducting a secret VIP evacuation in the Philippines in June 1945; examining the stealthy, dangerous tactics they used that would set a US Navy record.

German U-boats roam the seas in packs, threatening to starve Britain into submission during World War II.

Great Britain faces losing its battle for survival against German U-boats until a new source of intelligence turns the tide in 1941.

The German U-boat hunters become the hunted as advances in technology turn the tide in the Allies' favor.

Viewing Southern Italy from the air; Greek temples on the Mediterranean; cities that just seem to float above the sea; one of the most powerful volcanoes on Earth.

The hot, dry extreme center of Australia is home to landscapes like nowhere else on Earth; fearsome apex predators, a town built by opals and Uluru, the cultural and spiritual heart of a nation.

Exhume chilling insights into ancient rituals, legendary warriors, and brutal deaths; investigate dozens of childrens skeletons in Peru, find out if Amazon warriors once lived in Russia, and see what a UK cave full of butchered remains reveals.

Contemplate the strange disappearance and reappearance of the master of macabre, Edgar Allan Poe, just before his death in 1849; explore the chilling rumour that Shakespeares grave was robbed, then chase down thieves who stole the Mona Lisa in 1911.

An American submarine crew gets an order: to hunt Japanese ships that are conducting a secret VIP evacuation in the Philippines in June 1945; examining the stealthy, dangerous tactics they used that would set a US Navy record.

The Great Pyramid of Giza, built for Khufu over 4,500 years ago, is the last standing Wonder; exclusive access unveils secret chambers, aiming to unravel its many mysteries.

On the site of Dahshur, south of Cairo, are two revolutionary monuments which seem to be the first real pyramids.

The Navy's U.S.S. Macon flew in the 1930's, the golden age of airships, and was able to both launch and recover airplanes; telling the lost story of America's airships, their rapid rise, tragic demise, and the bold experiments in between.

Visiting London's Gherkin, Seattle's Evergreen Point Floating Bridge and Lyon's Musée des Confluences to uncover how and why they were built.

Mike joins the U.S. Marines' Heavy Haulers helicopter squadron and gets inside their battle to keep a fleet of souped-up Sikorsky CH-53E Super Stallion choppers flying as they prepare for intense war games in the desert and mountains.

Going behind the scenes with the Panama Canal Railway; big track repairs, massive machines, and unrelenting deadlines.

Visiting London's Gherkin, Seattle's Evergreen Point Floating Bridge and Lyon's Musée des Confluences to uncover how and why they were built.

Mike joins the U.S. Marines' Heavy Haulers helicopter squadron and gets inside their battle to keep a fleet of souped-up Sikorsky CH-53E Super Stallion choppers flying as they prepare for intense war games in the desert and mountains.

Going behind the scenes with the Panama Canal Railway; big track repairs, massive machines, and unrelenting deadlines.

Visiting London's Gherkin, Seattle's Evergreen Point Floating Bridge and Lyon's Musée des Confluences to uncover how and why they were built.

Mike joins the U.S. Marines' Heavy Haulers helicopter squadron and gets inside their battle to keep a fleet of souped-up Sikorsky CH-53E Super Stallion choppers flying as they prepare for intense war games in the desert and mountains.

Going behind the scenes with the Panama Canal Railway; big track repairs, massive machines, and unrelenting deadlines.

Visiting London's Gherkin, Seattle's Evergreen Point Floating Bridge and Lyon's Musée des Confluences to uncover how and why they were built.

The St. Lawrence River is one that forged North America, allowing ships to traverse the continent; the adventure begins in Canada's first capital city of Kingston and near Canada's second-largest city of Montreal.

Take a deep dive into watery enigmas; glide over a sunken Italian city; a unique underwater cemetery in the Florida Keys; a yellow brick road to nowhere in the depths of the North Pacific; puzzling rocky constructions off the coast of Australia.

Arctic conditions continue to wreak havoc in British Columbia; Jeremy Birch is called upon to raise a concrete-hulled vessel.

The St. Lawrence River is one that forged North America, allowing ships to traverse the continent; the adventure begins in Canada's first capital city of Kingston and near Canada's second-largest city of Montreal.

The Dawn mission explores the asteroid Vesta and dwarf planet Ceres.

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Arctic conditions continue to wreak havoc in British Columbia; Jeremy Birch is called upon to raise a concrete-hulled vessel.

The Navy's U.S.S. Macon flew in the 1930's, the golden age of airships, and was able to both launch and recover airplanes; telling the lost story of America's airships, their rapid rise, tragic demise, and the bold experiments in between.

Eye-witness accounts from those who fought in the US military's bloodiest battle on the European front in World War II.

The history of the B-1 Lancer reveals how the Cold War bomber evolved to become one of Americas most effective military aircraft.

The Allies plan their landing in Normandy and devise a diversionary operation in the north; commando attacks continue and the resistance becomes more active; Hitler continues his building projects.

A different view of the events in the Arctic during World War II, with unknown details; a focus on the struggle of the great powers for control of the area and its natural resources.

The Navy's U.S.S. Macon flew in the 1930's, the golden age of airships, and was able to both launch and recover airplanes; telling the lost story of America's airships, their rapid rise, tragic demise, and the bold experiments in between.

Mike joins the U.S. Marines' Heavy Haulers helicopter squadron and gets inside their battle to keep a fleet of souped-up Sikorsky CH-53E Super Stallion choppers flying as they prepare for intense war games in the desert and mountains.

Visiting London's Gherkin, Seattle's Evergreen Point Floating Bridge and Lyon's Musée des Confluences to uncover how and why they were built.

A bush airport fights fire with fire; flying Namibian cowboys race against the heat to save antelope from drought; a father and son duo of mechanics tackle a test that can make or break their careers, and an endangered Pangolin.

An orphaned bear cub flies to a new home, bush pilots bring life-saving medical machinery to a remote village, record snowfall threatens to close down Anchorage Airport for Thanksgiving, and the US Army prepares for airborne war.

Western Mexico reveals the country's most iconic images. From the birthplace of tequila and mariachi to the world's busiest border. Golden sands border the aquarium of the world while volcanic craters mirror lunar landscapes.

A bush airport fights fire with fire; flying Namibian cowboys race against the heat to save antelope from drought; a father and son duo of mechanics tackle a test that can make or break their careers, and an endangered Pangolin.

An orphaned bear cub flies to a new home, bush pilots bring life-saving medical machinery to a remote village, record snowfall threatens to close down Anchorage Airport for Thanksgiving, and the US Army prepares for airborne war.

Western Mexico reveals the country's most iconic images. From the birthplace of tequila and mariachi to the world's busiest border. Golden sands border the aquarium of the world while volcanic craters mirror lunar landscapes.

A bush airport fights fire with fire; flying Namibian cowboys race against the heat to save antelope from drought; a father and son duo of mechanics tackle a test that can make or break their careers, and an endangered Pangolin.

An orphaned bear cub flies to a new home, bush pilots bring life-saving medical machinery to a remote village, record snowfall threatens to close down Anchorage Airport for Thanksgiving, and the US Army prepares for airborne war.

Western Mexico reveals the country's most iconic images. From the birthplace of tequila and mariachi to the world's busiest border. Golden sands border the aquarium of the world while volcanic craters mirror lunar landscapes.

A bush airport fights fire with fire; flying Namibian cowboys race against the heat to save antelope from drought; a father and son duo of mechanics tackle a test that can make or break their careers, and an endangered Pangolin.

Navigating the historic Potomac River from West Virginia to Chesapeake Bay, passing through Washington, D.C. and the national monuments and ending at George Washington's Mount Vernon estate.

Psychedelic swirls in the Utah wastelands; a bizarre configuration of circles in the Sahara; hidden lines with the help of a drone; a remote polka-dot lake in Canada.

Phil Risko's team at Northstar works fast to refloat a trawler that's been blown onto the shore of a national park in New Jersey; the team improvises to get it back to sea before it suffers further damage.

Navigating the historic Potomac River from West Virginia to Chesapeake Bay, passing through Washington, D.C. and the national monuments and ending at George Washington's Mount Vernon estate.

The search for water is actually the search for life, and that search is taking man to some unusual places, including a moon of Saturn.

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Phil Risko's team at Northstar works fast to refloat a trawler that's been blown onto the shore of a national park in New Jersey; the team improvises to get it back to sea before it suffers further damage.

A mass uprising that shows the world the truth about the Nazis' secret Sobibor death camp; learn how the Davao Dozen break out of a harsh Japanese penal colony and explore how two plucky German pilots plot to get out of Britain.

The history of the B-1 Lancer reveals how the Cold War bomber evolved to become one of Americas most effective military aircraft.

Menkaure's pyramid, the third at Giza, is smaller but revealing; uncovering its bicolor structure, granite chamber, and lost sarcophagus, telling a king's story.

Takes a look inside the Pyramid of Menkaure and its unfinished bicolor monument, including a chamber made entirely of graphite and a sarcophagus buried at sea.

Tallying the carnage that followed the disappearance of a Russian wonder; exploring Incan sacrificial rituals; studying a global rivalry sparked by an Egyptian stone; seeing the haunting paintings of a Spanish artist who descended into madness.

Egyptologists try to determine who built the Sphinx and why by exploring the power struggles between Khufu's sons after the pharaoh's death.

A bush airport fights fire with fire; flying Namibian cowboys race against the heat to save antelope from drought; a father and son duo of mechanics tackle a test that can make or break their careers, and an endangered Pangolin.

An orphaned bear cub flies to a new home, bush pilots bring life-saving medical machinery to a remote village, record snowfall threatens to close down Anchorage Airport for Thanksgiving, and the US Army prepares for airborne war.

Western Mexico reveals the country's most iconic images. From the birthplace of tequila and mariachi to the world's busiest border. Golden sands border the aquarium of the world while volcanic craters mirror lunar landscapes.

In May 1941, the British Royal Navy relentlessly pursues the formidable battleship Bismarck with the mission to sink it at any cost.

New high-tech investigations uncover what sunk a World War I cruiser, a World War II submarine, a British destroyer from the Falklands War, and more.

Dictators often attempt to expand their jurisdiction beyond the borders of their country; this usually means armed invasion and the death of large numbers of soldiers and civilians.

Dictators often attempt to expand their jurisdiction beyond the borders of their country; this usually means armed invasion and the death of large numbers of soldiers and civilians.

In May 1941, the British Royal Navy relentlessly pursues the formidable battleship Bismarck with the mission to sink it at any cost.

New high-tech investigations uncover what sunk a World War I cruiser, a World War II submarine, a British destroyer from the Falklands War, and more.

Dictators often attempt to expand their jurisdiction beyond the borders of their country; this usually means armed invasion and the death of large numbers of soldiers and civilians.

Dictators often attempt to expand their jurisdiction beyond the borders of their country; this usually means armed invasion and the death of large numbers of soldiers and civilians.

Egyptologists try to determine who built the Sphinx and why by exploring the power struggles between Khufu's sons after the pharaoh's death.

New high-tech investigations uncover what sunk a World War I cruiser, a World War II submarine, a British destroyer from the Falklands War, and more.

Dictators often attempt to expand their jurisdiction beyond the borders of their country; this usually means armed invasion and the death of large numbers of soldiers and civilians.

Dictators often attempt to expand their jurisdiction beyond the borders of their country; this usually means armed invasion and the death of large numbers of soldiers and civilians.

Egyptologists try to determine who built the Sphinx and why by exploring the power struggles between Khufu's sons after the pharaoh's death.

A journey down one of the wild rivers in the world, the Yukon; the unusual trip starts in an aircraft piloted by a painter and the odyssey ends with a visit to a graveyard of disintegrating rear-wheel steamers.

Learning why an important urban center is sinking toward oblivion; soaring over sprawling ruins buried under Saharan sands; learning the modern secret of an ancient fortress; eyeing a ghost town on the edge of the Gobi.

At the mouth of the Suez Canal, Lino Arosemena and his crew have a monster repair job of removing and refitting a 20-ton propeller.

The Dawn mission explores the asteroid Vesta and dwarf planet Ceres.

Paid programming.

Learning why an important urban center is sinking toward oblivion; soaring over sprawling ruins buried under Saharan sands; learning the modern secret of an ancient fortress; eyeing a ghost town on the edge of the Gobi.

At the mouth of the Suez Canal, Lino Arosemena and his crew have a monster repair job of removing and refitting a 20-ton propeller.

A bush airport fights fire with fire; flying Namibian cowboys race against the heat to save antelope from drought; a father and son duo of mechanics tackle a test that can make or break their careers, and an endangered Pangolin.

A different view of the events in the Arctic during World War II, with unknown details; a focus on the struggle of the great powers for control of the area and its natural resources.

The Navy's U.S.S. Macon flew in the 1930's, the golden age of airships, and was able to both launch and recover airplanes; telling the lost story of America's airships, their rapid rise, tragic demise, and the bold experiments in between.

Western Mexico reveals the country's most iconic images. From the birthplace of tequila and mariachi to the world's busiest border. Golden sands border the aquarium of the world while volcanic craters mirror lunar landscapes.

Dictators often attempt to expand their jurisdiction beyond the borders of their country; this usually means armed invasion and the death of large numbers of soldiers and civilians.

Dictators often attempt to expand their jurisdiction beyond the borders of their country; this usually means armed invasion and the death of large numbers of soldiers and civilians.

In May 1941, the British Royal Navy relentlessly pursues the formidable battleship Bismarck with the mission to sink it at any cost.

New high-tech investigations uncover what sunk a World War I cruiser, a World War II submarine, a British destroyer from the Falklands War, and more.

Dictators often attempt to expand their jurisdiction beyond the borders of their country; this usually means armed invasion and the death of large numbers of soldiers and civilians.

Dictators often attempt to expand their jurisdiction beyond the borders of their country; this usually means armed invasion and the death of large numbers of soldiers and civilians.

Visiting Australia's One Central Park, the Oslo Opera House and the California Academy of Sciences in San Francisco to reveal their architectural secrets.

Menkaure's pyramid, the third at Giza, is smaller but revealing; uncovering its bicolor structure, granite chamber, and lost sarcophagus, telling a king's story.

Takes a look inside the Pyramid of Menkaure and its unfinished bicolor monument, including a chamber made entirely of graphite and a sarcophagus buried at sea.

The world has its focus on the Pyramid of Khufu in Egypt, but nearby on the Giza plateau, other architectural masterpieces stand the test of time.

Menkaure's pyramid, the third at Giza, is smaller but revealing; uncovering its bicolor structure, granite chamber, and lost sarcophagus, telling a king's story.

Takes a look inside the Pyramid of Menkaure and its unfinished bicolor monument, including a chamber made entirely of graphite and a sarcophagus buried at sea.

The world has its focus on the Pyramid of Khufu in Egypt, but nearby on the Giza plateau, other architectural masterpieces stand the test of time.

Menkaure's pyramid, the third at Giza, is smaller but revealing; uncovering its bicolor structure, granite chamber, and lost sarcophagus, telling a king's story.

Takes a look inside the Pyramid of Menkaure and its unfinished bicolor monument, including a chamber made entirely of graphite and a sarcophagus buried at sea.

The world has its focus on the Pyramid of Khufu in Egypt, but nearby on the Giza plateau, other architectural masterpieces stand the test of time.

Meandering through the black waters of a primordial river immortalized in a folk song.

Get petrified by cryptic rock structures normally hidden from view; look inside curious dwellings in the Peruvian Andes; visit a sacred monolith in Wyoming's Black Hills; haunt a Turkish stone village; spot an immovable waterfall in Mexico.

A journey down one of the wild rivers in the world, the Yukon; the unusual trip starts in an aircraft piloted by a painter and the odyssey ends with a visit to a graveyard of disintegrating rear-wheel steamers.

Scientists are now probing to detect gravity waves in space and mapping the gravity patterns of the moon for the first time.

Paid programming.

Get petrified by cryptic rock structures normally hidden from view; look inside curious dwellings in the Peruvian Andes; visit a sacred monolith in Wyoming's Black Hills; haunt a Turkish stone village; spot an immovable waterfall in Mexico.

Meandering through the black waters of a primordial river immortalized in a folk song.

Eye-witness accounts from those who fought in the US military's bloodiest battle on the European front in World War II.

The Allies plan their landing in Normandy and devise a diversionary operation in the north; commando attacks continue and the resistance becomes more active; Hitler continues his building projects.

The history of the B-1 Lancer reveals how the Cold War bomber evolved to become one of Americas most effective military aircraft.

Mike joins the U.S. Marines' Heavy Haulers helicopter squadron and gets inside their battle to keep a fleet of souped-up Sikorsky CH-53E Super Stallion choppers flying as they prepare for intense war games in the desert and mountains.

Visiting Australia's One Central Park, the Oslo Opera House and the California Academy of Sciences in San Francisco to reveal their architectural secrets.

Menkaure's pyramid, the third at Giza, is smaller but revealing; uncovering its bicolor structure, granite chamber, and lost sarcophagus, telling a king's story.

Takes a look inside the Pyramid of Menkaure and its unfinished bicolor monument, including a chamber made entirely of graphite and a sarcophagus buried at sea.

The world has its focus on the Pyramid of Khufu in Egypt, but nearby on the Giza plateau, other architectural masterpieces stand the test of time.

The far south of Australia is home to the rich cultural heritage of Melbourne; a sporting mecca called the G; a brutal island prison once known as hell on Earth and ancient rainforests, providing a living link to the past.

Challenge long-held beliefs about Viking leadership, weaponry, and brutality; inspect a warriors tomb full of clues in Sweden, a sword of unparalleled quality in Norway, and a pile of headless skeletons in the UK that reveal unimaginable violence.

Investigate the sudden death of a tycoon linked to King Tuts tomb; search for three lighthouse keepers who vanished from the Flannan Isles, then analyze the gruesome, unexplained deaths of nine hikers at the Dyatlov Pass in the Ural Mountains.

The far south of Australia is home to the rich cultural heritage of Melbourne; a sporting mecca called the G; a brutal island prison once known as hell on Earth and ancient rainforests, providing a living link to the past.

Challenge long-held beliefs about Viking leadership, weaponry, and brutality; inspect a warriors tomb full of clues in Sweden, a sword of unparalleled quality in Norway, and a pile of headless skeletons in the UK that reveal unimaginable violence.

Investigate the sudden death of a tycoon linked to King Tuts tomb; search for three lighthouse keepers who vanished from the Flannan Isles, then analyze the gruesome, unexplained deaths of nine hikers at the Dyatlov Pass in the Ural Mountains.

The far south of Australia is home to the rich cultural heritage of Melbourne; a sporting mecca called the G; a brutal island prison once known as hell on Earth and ancient rainforests, providing a living link to the past.

Challenge long-held beliefs about Viking leadership, weaponry, and brutality; inspect a warriors tomb full of clues in Sweden, a sword of unparalleled quality in Norway, and a pile of headless skeletons in the UK that reveal unimaginable violence.

Investigate the sudden death of a tycoon linked to King Tuts tomb; search for three lighthouse keepers who vanished from the Flannan Isles, then analyze the gruesome, unexplained deaths of nine hikers at the Dyatlov Pass in the Ural Mountains.

The far south of Australia is home to the rich cultural heritage of Melbourne; a sporting mecca called the G; a brutal island prison once known as hell on Earth and ancient rainforests, providing a living link to the past.

A journey on Scotland's River Spey, traveling from its source in the Highlands, winding by boat through the mountains to where the river meets the North Sea.

Witness animal spectacles from high above the Earth; watch a whirling herd of northern nomads; see undersea behemoths show off in the Pacific shallows; track a U.S. porcine stampede; confront top ocean predators on the Florida coast.

Meandering through the black waters of a primordial river immortalized in a folk song.

The Dawn mission explores the asteroid Vesta and dwarf planet Ceres.

Scientists are now probing to detect gravity waves in space and mapping the gravity patterns of the moon for the first time.

Witness animal spectacles from high above the Earth; watch a whirling herd of northern nomads; see undersea behemoths show off in the Pacific shallows; track a U.S. porcine stampede; confront top ocean predators on the Florida coast.

A journey on Scotland's River Spey, traveling from its source in the Highlands, winding by boat through the mountains to where the river meets the North Sea.

The Allies plan their landing in Normandy and devise a diversionary operation in the north; commando attacks continue and the resistance becomes more active; Hitler continues his building projects.

The Navy's U.S.S. Macon flew in the 1930's, the golden age of airships, and was able to both launch and recover airplanes; telling the lost story of America's airships, their rapid rise, tragic demise, and the bold experiments in between.

Eye-witness accounts from those who fought in the US military's bloodiest battle on the European front in World War II.

A look at how the post-war period and the Cold War unfolded high up in the North; recently published archival material helps to shed light on post-war events in the Arctic.

An exploration of Hadrian's Wall, the largest structure built by the Romans; experts examine the Wall, its forts, gatehouses, and garrison town to see how civilization and culture grew.

The far south of Australia is home to the rich cultural heritage of Melbourne; a sporting mecca called the G; a brutal island prison once known as hell on Earth and ancient rainforests, providing a living link to the past.

Challenge long-held beliefs about Viking leadership, weaponry, and brutality; inspect a warriors tomb full of clues in Sweden, a sword of unparalleled quality in Norway, and a pile of headless skeletons in the UK that reveal unimaginable violence.

Investigate the sudden death of a tycoon linked to King Tuts tomb; search for three lighthouse keepers who vanished from the Flannan Isles, then analyze the gruesome, unexplained deaths of nine hikers at the Dyatlov Pass in the Ural Mountains.

A look at the failures that forced a US submarine commander to rebuild his crew's trust, one person at a time; discovering how this commanding officer overcame dissent on board and refocused on targeting enemy ships in dangerous Japanese waters.

The inside story of Britain's flagship super jet of the Cold War era, the Hawker Hunter, and its most thrilling flights during the late 20th century.

Allied forces move to take the valuable islands of Tinian and Guam that threaten American air operations; meanwhile, Gen. Curtis LeMay is tasked with planning and executing a fire bombing campaign against Japan.

A look at the failures that forced a US submarine commander to rebuild his crew's trust, one person at a time; discovering how this commanding officer overcame dissent on board and refocused on targeting enemy ships in dangerous Japanese waters.

The inside story of Britain's flagship super jet of the Cold War era, the Hawker Hunter, and its most thrilling flights during the late 20th century.

Allied forces move to take the valuable islands of Tinian and Guam that threaten American air operations; meanwhile, Gen. Curtis LeMay is tasked with planning and executing a fire bombing campaign against Japan.

A look at the failures that forced a US submarine commander to rebuild his crew's trust, one person at a time; discovering how this commanding officer overcame dissent on board and refocused on targeting enemy ships in dangerous Japanese waters.

The inside story of Britain's flagship super jet of the Cold War era, the Hawker Hunter, and its most thrilling flights during the late 20th century.

Allied forces move to take the valuable islands of Tinian and Guam that threaten American air operations; meanwhile, Gen. Curtis LeMay is tasked with planning and executing a fire bombing campaign against Japan.

A look at the failures that forced a US submarine commander to rebuild his crew's trust, one person at a time; discovering how this commanding officer overcame dissent on board and refocused on targeting enemy ships in dangerous Japanese waters.

A look at experimental ships and revolutionary designers that have changed the tide of war through the centuries.

The legendary Battle of Trafalgar in 1805, which pitted Napoleon's French ships against a British armada under the command of Admiral Horatio Nelson.

A portrayal of a crucial September 1950 military operation that helped the UN and ROK gain the upper hand over North Korea in the Korean War.

A look at key naval battles that have taken place in the Persian Gulf over the last 50 years and the warships involved, from both sides of the conflicts.

New high-tech investigations uncover what sunk a World War I cruiser, a World War II submarine, a British destroyer from the Falklands War, and more.

A look at how navy weapons have evolved over the centuries, from cannons to gun turrets to nuclear missiles and beyond.

The Navy's U.S.S. Macon flew in the 1930's, the golden age of airships, and was able to both launch and recover airplanes; telling the lost story of America's airships, their rapid rise, tragic demise, and the bold experiments in between.

A look at how the post-war period and the Cold War unfolded high up in the North; recently published archival material helps to shed light on post-war events in the Arctic.

A secret British regiment in 1942 led a daring raid on a Nazi-occupied Libyan harbor.

Eyewitness accounts from those who fought in the US military's bloodiest battle on the European front in World War II.

The Allies plan their landing in Normandy and devise a diversionary operation in the north; commando attacks continue and the resistance becomes more active; Hitler continues his building projects.

A look at the failures that forced a US submarine commander to rebuild his crew's trust, one person at a time; discovering how this commanding officer overcame dissent on board and refocused on targeting enemy ships in dangerous Japanese waters.

A secret British regiment in 1942 led a daring raid on a Nazi-occupied Libyan harbor.

The Allies plan their landing in Normandy and devise a diversionary operation in the north; commando attacks continue and the resistance becomes more active; Hitler continues his building projects.