Investigating whether the pharaoh who ordered the building of the Great Pyramid of Giza was really the tyrant he was said to be.

From a century-old water tower turned stunning new homestead, to a three-pronged repurposing mission that's taking the U.K. to space, repurposing is now doing more than just traversing continents.

An in-depth look at the life of China's first emperor, Qin Shi Huang, reveals new truths about his controversial rule.

Investigating whether the pharaoh who ordered the building of the Great Pyramid of Giza was really the tyrant he was said to be.

The search for a missing Olympic gold medal won by one of the greatest sports heroes in American history.

From a century-old water tower turned stunning new homestead, to a three-pronged repurposing mission that's taking the U.K. to space, repurposing is now doing more than just traversing continents.

An in-depth look at the life of China's first emperor, Qin Shi Huang, reveals new truths about his controversial rule.

Investigating whether the pharaoh who ordered the building of the Great Pyramid of Giza was really the tyrant he was said to be.

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

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.

The history of the solar system might be preserved out in the dark domain of Pluto and beyond.

A dramatic repair mission gives the Hubble Space Telescope another chance to capture stunning pictures like only it can.

Jupiter, Saturn, Uranus and Neptune all have exotic atmospheres, liquid interiors and rings.

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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.

The history of the solar system might be preserved out in the dark domain of Pluto and beyond.

A dramatic repair mission gives the Hubble Space Telescope another chance to capture stunning pictures like only it can.

A new raven breeding program begins at the Tower of London as the retiring governor prepares to commemorate Queen Elizabeth's 93rd birthday.

When the lost tomb of King Tut is opened in 1922, it's not only the famous Curse that is unleashed.

The story of the engineers who created the world's first reusable space vehicle.

A new raven breeding program begins at the Tower of London as the retiring governor prepares to commemorate Queen Elizabeth's 93rd birthday.

When the lost tomb of King Tut is opened in 1922, it's not only the famous Curse that is unleashed.

U.S. paratroopers that dropped into France before the D-Day landings battle Nazi defenders for a key bridge behind enemy lines.

From a century-old water tower turned stunning new homestead, to a three-pronged repurposing mission that's taking the U.K. to space, repurposing is now doing more than just traversing continents.

Investigating whether the pharaoh who ordered the building of the Great Pyramid of Giza was really the tyrant he was said to be.

Once-great triumphs of marine engineering now left to rust include a ship graveyard in Maryland.

Come across a set of disturbingly familiar stone monoliths in Colombia, then explore a lost city in the Sierra Nevada de Santa Marta; puzzle over an ancient ruin in Corinth, Greece, and explore an old structure on a Maltese island.

The legendary city of Kish, Iraq, lies at the cradle of human civilization and home to some of the world's first kings; using cutting-edge tech, experts investigate the buried secrets of this lost city to uncover the first origins of royalty.

Once-great triumphs of marine engineering now left to rust include a ship graveyard in Maryland.

Come across a set of disturbingly familiar stone monoliths in Colombia, then explore a lost city in the Sierra Nevada de Santa Marta; puzzle over an ancient ruin in Corinth, Greece, and explore an old structure on a Maltese island.

The legendary city of Kish, Iraq, lies at the cradle of human civilization and home to some of the world's first kings; using cutting-edge tech, experts investigate the buried secrets of this lost city to uncover the first origins of royalty.

Zoom in on some otherworldly sights; spot a giant glacier on the Red Planet, let the milky seas off the coast of Java bathe your vision, ponder a huge hexagon floating above Saturn and take a spin around a doughnut-shaped lake in Saskatchewan.

Once-great triumphs of marine engineering now left to rust include a ship graveyard in Maryland.

Come across a set of disturbingly familiar stone monoliths in Colombia, then explore a lost city in the Sierra Nevada de Santa Marta; puzzle over an ancient ruin in Corinth, Greece, and explore an old structure on a Maltese island.

The legendary city of Kish, Iraq, lies at the cradle of human civilization and home to some of the world's first kings; using cutting-edge tech, experts investigate the buried secrets of this lost city to uncover the first origins of royalty.

A journey along the geological marvel that is the Bay of Fundy coastline.

Take a bird's-eye-view of Cape Breton Island; soar above from the Canso Causeway to the Cape Breton Highlands, and see the Cabot Trail.

In the future, telescopes will allow scientists to see further to planets that may support life.

In an attempt to view the cosmos beyond the scope of human vision, infrared light and gamma radiation are used.

A journey along the geological marvel that is the Bay of Fundy coastline.

Take a bird's-eye-view of Cape Breton Island; soar above from the Canso Causeway to the Cape Breton Highlands, and see the Cabot Trail.

In the future, telescopes will allow scientists to see further to planets that may support life.

In an attempt to view the cosmos beyond the scope of human vision, infrared light and gamma radiation are used.

A behind-the-scenes look at an ambitious war commemoration and retirement gala; a look back at the Tower's vital role during times of war.

Six million African Americans leave the southern states in the Great Migration to seek freedom and opportunity in the north and west.

Engineers come together to create the International Space Station, humanity's first permanent outpost in space; the largest space structure ever created.

A behind-the-scenes look at an ambitious war commemoration and retirement gala; a look back at the Tower's vital role during times of war.

Six million African Americans leave the southern states in the Great Migration to seek freedom and opportunity in the north and west.

Five months after D-Day, the ground war finally arrives on German soil as British soldiers attack in the shadow of Hitler's infamous Siegfried Line.

Come across a set of disturbingly familiar stone monoliths in Colombia, then explore a lost city in the Sierra Nevada de Santa Marta; puzzle over an ancient ruin in Corinth, Greece, and explore an old structure on a Maltese island.

The legendary city of Kish, Iraq, lies at the cradle of human civilization and home to some of the world's first kings; using cutting-edge tech, experts investigate the buried secrets of this lost city to uncover the first origins of royalty.

When a magnitude 6.9 earthquake strikes San Francisco in 1989, the city is thrown into chaos.

Exploring the world's top close air support aircraft, which enter battles at a minute's notice.

In the autumn of 1944, Patton's Third Army approaches the heavily fortified region of Metz; after being turned back from Fort Driant, Patton's men target Fort Koenigsmacker a month later.

When a magnitude 6.9 earthquake strikes San Francisco in 1989, the city is thrown into chaos.

"Air Warrriors" puts the spotlight on some of the airplanes that have been used by American forces in combat battles through the years. The program profiles the dedicated pilots and other team members who fly and maintain the aircraft. Rarely seen combat footage and pilots' stories help bring to life the journeys that have been taken by the flying machines, which include a plane-chopper hybrid that saves lives and an attack helicopter that is called the Black Death by America's enemies.

Nazi diehard and fanatics fight to the last man to stop Allied forces from freeing Europe, keeping an unrelenting grip on the naval bases, citadels and fortresses of occupied Europe.

Archaeologists use modern technology to determine if the reputation of China's only empress is based on fact.

Explores strongholds abandoned by their architects; a lost city in the Amazon jungle; a desert fortress made by humanity's most notorious empire; explores a city of identical castles; examines a Greek isle's bloody history from the air.

From the devastatingly bombed streets of London to industrial Chicago to Nazi Berlin, capturing nail-biting criminal investigations to prove that everything is not always what it seems.

When a magnitude 6.9 earthquake strikes San Francisco in 1989, the city is thrown into chaos.

Exploring machines invented for human survival in the extreme cold across the planet.

Exploring the world's top close air support aircraft, which enter battles at a minute's notice.

Some people like to hop in a car to take a road trip across America, visiting as many landmarks as possible along the way. Since such a trek can take a while to complete, taking a flight across America might be a better option for some people. "Aerial America" takes viewers on such a flight, offering rare looks at some of the nation's best-loved landmarks from high in the sky. Cameras capture the history and pageantry of America as they zoom over busy cityscapes and quiet, rural lands. Many episodes focus on a specific state, showcasing highlights of the state's beauty, while others revolve around themes such as the best small towns and natural wonders found in the country.

In the autumn of 1944, Patton's Third Army approaches the heavily fortified region of Metz; after being turned back from Fort Driant, Patton's men target Fort Koenigsmacker a month later.

An exploration of Canada's expansive coastline and undefended border, from an aerial view.

A look at the history and diversity of Canada's most spectacular national parks.

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.

A look at the history and diversity of Canada's most spectacular national parks.

An exploration of Canada's expansive coastline and undefended border, from an aerial view.

Advanced telescopes capture images of the night sky from the Atacama Desert.

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

An exploration of Canada's expansive coastline and undefended border, from an aerial view.

An exploration of Canada's expansive coastline and undefended border, from an aerial view.

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.

Follows an archaeological team in Cambodia as it uncovers the mysteries of Angkor Wat.

Advanced telescopes capture images of the night sky from the Atacama Desert.

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

From the devastatingly bombed streets of London to industrial Chicago to Nazi Berlin, capturing nail-biting criminal investigations to prove that everything is not always what it seems.

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

The breathtaking peaks, rivers and tundra of Alaska.

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

A chronicle of the daily challenges of the airport staff who manage to keep the facility open, freight flowing and passengers flying all despite weather that regularly dips to -36 degrees and wind speeds that typically exceed 100 mph.

An elite squad of Norwegians destroy a power plant in 1943 that the Nazis may have been using for nuclear weapons research.

"Air Warrriors" puts the spotlight on some of the airplanes that have been used by American forces in combat battles through the years. The program profiles the dedicated pilots and other team members who fly and maintain the aircraft. Rarely seen combat footage and pilots' stories help bring to life the journeys that have been taken by the flying machines, which include a plane-chopper hybrid that saves lives and an attack helicopter that is called the Black Death by America's enemies.

U.S. paratroopers that dropped into France before the D-Day landings battle Nazi defenders for a key bridge behind enemy lines.

Nazi diehard and fanatics fight to the last man to stop Allied forces from freeing Europe, keeping an unrelenting grip on the naval bases, citadels and fortresses of occupied Europe.

Exploring machines invented for human survival in the extreme cold across the planet.

When a magnitude 6.9 earthquake strikes San Francisco in 1989, the city is thrown into chaos.

Follows an archaeological team in Cambodia as it uncovers the mysteries of Angkor Wat.

Exploring the world's top close air support aircraft, which enter battles at a minute's notice.

From the devastatingly bombed streets of London to industrial Chicago to Nazi Berlin, capturing nail-biting criminal investigations to prove that everything is not always what it seems.

In August 1944, when Hitler launches Operation Lüttich to retake the port city of Avranches, German panzer and SS troops quickly overrun the French town of Mortain and encircle a battalion of US soldiers who hold the high ground on Hill 314.

Some of the greatest warships have gone on to shape the history of the world and have even pushed their crews into unbelievable and incredible acts of bravery. Take a look at the very first submarine which is rumored to have lurked beneath New York harbor during the Revolutionary War, the smaller ships that rescued thousands from Dunkirk, or the destroyer in the Cuban Missile Crisis. Over the years, conflicts and wars have prompted extreme advances to ship designs and now they are faster, stronger, and smarter than ever before.

More than 75 years since the historic Allied invasion; Conflict archeologists uncover hidden evidence on and off the shores of Normandy, thanks to drone technology; One team examines the site of a British commando raid that liberated Port-en-Bessin.

A look at the string of errors that together sealed the fate of the Twin Towers, JFK, Deepwater Horizon and more.

Look at the opening acts of WW II as the Soviets launch their Winter War in Finland; see why the global media focused on the grim, snowy fighting while the Axis turned its eyes toward neighboring Norway and the rich mineral wealth of the north.

A chronicle of the daily challenges of the airport staff who manage to keep the facility open, freight flowing and passengers flying all despite weather that regularly dips to -36 degrees and wind speeds that typically exceed 100 mph.

Stories of historic Black struggle for equality in maritime combat; an enslaved powder boy who served during the French and Indian War; a Civil War gunner; the first African American to command a vessel with a fully integrated crew: Hugh Mulzac.

Some of the greatest warships have gone on to shape the history of the world and have even pushed their crews into unbelievable and incredible acts of bravery. Take a look at the very first submarine which is rumored to have lurked beneath New York harbor during the Revolutionary War, the smaller ships that rescued thousands from Dunkirk, or the destroyer in the Cuban Missile Crisis. Over the years, conflicts and wars have prompted extreme advances to ship designs and now they are faster, stronger, and smarter than ever before.

More than 75 years since the historic Allied invasion; Conflict archeologists uncover hidden evidence on and off the shores of Normandy, thanks to drone technology; One team examines the site of a British commando raid that liberated Port-en-Bessin.

Look at the opening acts of WW II as the Soviets launch their Winter War in Finland; see why the global media focused on the grim, snowy fighting while the Axis turned its eyes toward neighboring Norway and the rich mineral wealth of the north.

Stories of historic Black struggle for equality in maritime combat; an enslaved powder boy who served during the French and Indian War; a Civil War gunner; the first African American to command a vessel with a fully integrated crew: Hugh Mulzac.

Stories of historic Black struggle for equality in maritime combat; an enslaved powder boy who served during the French and Indian War; a Civil War gunner; the first African American to command a vessel with a fully integrated crew: Hugh Mulzac.

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.

More than 75 years since the historic Allied invasion; Conflict archeologists uncover hidden evidence on and off the shores of Normandy, thanks to drone technology; One team examines the site of a British commando raid that liberated Port-en-Bessin.

Look at the opening acts of WW II as the Soviets launch their Winter War in Finland; see why the global media focused on the grim, snowy fighting while the Axis turned its eyes toward neighboring Norway and the rich mineral wealth of the north.

Stories of historic Black struggle for equality in maritime combat; an enslaved powder boy who served during the French and Indian War; a Civil War gunner; the first African American to command a vessel with a fully integrated crew: Hugh Mulzac.

The loyalist city of Saint John and international borders beyond, one of the worlds most famous waterways.

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 South Pacific, and puzzling rocky constructions off the coast of Australia.

The natural wonders of the Gaspe Peninsula.

Using computer simulations, it is possible to fly over other worlds and see how galaxies interact.

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

The loyalist city of Saint John and international borders beyond, one of the worlds most famous waterways.

The natural wonders of the Gaspe Peninsula.

Using computer simulations, it is possible to fly over other worlds and see how galaxies interact.

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

Unraveling centuries of bloodshed and avarice surrounding an unlucky Indian jewel; exploring a car where a Hollywood star met an untimely death; assessing the violent end of an English king's legacy and an ominous Assyrian curse etched in stone.

Uncovers the origins of the curses surrounding the Fabergé eggs, the Unlucky Mummy and more in a historical journey from revolutionary Russia to Ancient Egypt.

Delving into the tragic sacking of the Kingdom of Benin and seeing if its ruins harbor bad luck; evaluating an unlucky Norwegian artist's paintings, an Egyptian portrait with a dark history, and stolen Lydian treasure that carries ancient ill will.

When the lost tomb of King Tut is opened in 1922, it's not only the famous Curse that is unleashed.

Six million African Americans leave the southern states in the Great Migration to seek freedom and opportunity in the north and west.

More than 75 years since the historic Allied invasion; Conflict archeologists uncover hidden evidence on and off the shores of Normandy, thanks to drone technology; One team examines the site of a British commando raid that liberated Port-en-Bessin.

Look at the opening acts of WW II as the Soviets launch their Winter War in Finland; see why the global media focused on the grim, snowy fighting while the Axis turned its eyes toward neighboring Norway and the rich mineral wealth of the north.

A heavy blizzard, an earthquake, and a plane crash threaten the safety of the Ice Airports as well as the people of downtown Anchorage.

Stories of historic Black struggle for equality in maritime combat; an enslaved powder boy who served during the French and Indian War; a Civil War gunner; the first African American to command a vessel with a fully integrated crew: Hugh Mulzac.

More than 75 years since the historic Allied invasion; Conflict archeologists uncover hidden evidence on and off the shores of Normandy, thanks to drone technology; One team examines the site of a British commando raid that liberated Port-en-Bessin.

A heavy blizzard, an earthquake, and a plane crash threaten the safety of the Ice Airports as well as the people of downtown Anchorage.

Mike works with the Army Corps of Engineers on a massive project to restore essential flow of fresh water to the Florida Everglades. He also joins scientists, python hunters and the Miccosuke Tribe to eliminate invasive species.

Peek inside a cloud-inspired library in Canada that's built over a live railway; see how clever engineering helped a huge Seattle skyscraper go up without harming its iconic neighbour, then cross an Australian bridge that floats above a busy river.

A heavy blizzard, an earthquake, and a plane crash threaten the safety of the Ice Airports as well as the people of downtown Anchorage.

Look at the opening acts of WW II as the Soviets launch their Winter War in Finland; see why the global media focused on the grim, snowy fighting while the Axis turned its eyes toward neighboring Norway and the rich mineral wealth of the north.

Mike works with the Army Corps of Engineers on a massive project to restore essential flow of fresh water to the Florida Everglades. He also joins scientists, python hunters and the Miccosuke Tribe to eliminate invasive species.

Stories of historic Black struggle for equality in maritime combat; an enslaved powder boy who served during the French and Indian War; a Civil War gunner; the first African American to command a vessel with a fully integrated crew: Hugh Mulzac.

Peek inside a cloud-inspired library in Canada that's built over a live railway; see how clever engineering helped a huge Seattle skyscraper go up without harming its iconic neighbour, then cross an Australian bridge that floats above a busy river.

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.

More than 75 years since the historic Allied invasion; Conflict archeologists uncover hidden evidence on and off the shores of Normandy, thanks to drone technology; One team examines the site of a British commando raid that liberated Port-en-Bessin.

A heavy blizzard, an earthquake, and a plane crash threaten the safety of the Ice Airports as well as the people of downtown Anchorage.

Look at the opening acts of WW II as the Soviets launch their Winter War in Finland; see why the global media focused on the grim, snowy fighting while the Axis turned its eyes toward neighboring Norway and the rich mineral wealth of the north.

Mike works with the Army Corps of Engineers on a massive project to restore essential flow of fresh water to the Florida Everglades. He also joins scientists, python hunters and the Miccosuke Tribe to eliminate invasive species.

Stories of historic Black struggle for equality in maritime combat; an enslaved powder boy who served during the French and Indian War; a Civil War gunner; the first African American to command a vessel with a fully integrated crew: Hugh Mulzac.

Peek inside a cloud-inspired library in Canada that's built over a live railway; see how clever engineering helped a huge Seattle skyscraper go up without harming its iconic neighbour, then cross an Australian bridge that floats above a busy river.

Incredible rock formations, peat farms and some of the East Coast's impressive sand dunes.

When seen from above, the pyramids of Giza align with the stars; survivors of Katrina find rescue when least expected; a volcano burns bright blue; a forgotten beach reveals its secrets.

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

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.

Incredible rock formations, peat farms and some of the East Coast's impressive sand dunes.

In an attempt to view the cosmos beyond the scope of human vision, infrared light and gamma radiation are used.

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

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.

As the official home of the Crown Jewels and other royal regalia, the Tower is the nation's most famous safe, but its security hasn't been airtight; curators hunt for King Henry VIII's crown and Queen Elizabeth I's last dress.

Egyptologists believe there was a perfect pyramid, hidden in the sands of Abu Rawash, which served as a tomb for the pharaoh Djedefre.

The inside story of the Hubble Space Telescope that almost broke NASA; the engineers behind its creation tell their story and how they staked their careers on repairing it.

As the official home of the Crown Jewels and other royal regalia, the Tower is the nation's most famous safe, but its security hasn't been airtight; curators hunt for King Henry VIII's crown and Queen Elizabeth I's last dress.

Egyptologists believe there was a perfect pyramid, hidden in the sands of Abu Rawash, which served as a tomb for the pharaoh Djedefre.

A platoon of American Buffalo Soldiers exceeds all expectations to advance on a Nazi-occupied castle in the foothills of Northern Italy.

Once-great triumphs of marine engineering now left to rust include a ship graveyard in Maryland.

An in-depth look at the life of China's first emperor, Qin Shi Huang, reveals new truths about his controversial rule.

An aerial tour of New York City, spanning the city's five boroughs, capturing man-made and natural wonders; revealing the ways its citizens live, work and play.

A damaged plane plunges Anchorage Airport into an emergency. A leak on a Coast Guard helicopter jeopardizes emergency cover. Rain turns the Fairbanks runways into ice rinks, and a dog-sled racing prodigy flies with furry teammates.

An airliner dodges thunderstorms flying to a cyclone-damaged island; aerial firefighters cross the country to battle infernos; daredevil chainsaw operators hang underneath helicopters.

An aerial tour of New York City, spanning the city's five boroughs, capturing man-made and natural wonders; revealing the ways its citizens live, work and play.

A damaged plane plunges Anchorage Airport into an emergency. A leak on a Coast Guard helicopter jeopardizes emergency cover. Rain turns the Fairbanks runways into ice rinks, and a dog-sled racing prodigy flies with furry teammates.

An airliner dodges thunderstorms flying to a cyclone-damaged island; aerial firefighters cross the country to battle infernos; daredevil chainsaw operators hang underneath helicopters.

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 South Pacific, and puzzling rocky constructions off the coast of Australia.

An aerial tour of New York City, spanning the city's five boroughs, capturing man-made and natural wonders; revealing the ways its citizens live, work and play.

A damaged plane plunges Anchorage Airport into an emergency. A leak on a Coast Guard helicopter jeopardizes emergency cover. Rain turns the Fairbanks runways into ice rinks, and a dog-sled racing prodigy flies with furry teammates.

An airliner dodges thunderstorms flying to a cyclone-damaged island; aerial firefighters cross the country to battle infernos; daredevil chainsaw operators hang underneath helicopters.

The Magdalen Islands.

The west coast of Newfoundland is a story of cultural history and natural beauty, from the first European settlements at historic Port au Choix, to the incredible, scenery of Gros Morne National Park.

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

For more than 25 years, the shuttle was our ticket to space and our laboratory in orbit.

The Magdalen Islands.

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.

Paid programming.

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

For more than 25 years, the shuttle was our ticket to space and our laboratory in orbit.

A look at how the Tower closes up for the night, what happens after dark, and a look at a daring 16th century prison break.

A great metropolis has been discovered, buried beneath the pastures of the Danube.

Project Viking set out to create a Mars lander with a miniature laboratory designed to travel more than 500 times the distance from Earth to the moon.

A look at how the Tower closes up for the night, what happens after dark, and a look at a daring 16th century prison break.

A great metropolis has been discovered, buried beneath the pastures of the Danube.

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

A damaged plane plunges Anchorage Airport into an emergency. A leak on a Coast Guard helicopter jeopardizes emergency cover. Rain turns the Fairbanks runways into ice rinks, and a dog-sled racing prodigy flies with furry teammates.

An airliner dodges thunderstorms flying to a cyclone-damaged island; aerial firefighters cross the country to battle infernos; daredevil chainsaw operators hang underneath helicopters.

Mike works with the Army Corps of Engineers on a massive project to restore essential flow of fresh water to the Florida Everglades. He also joins scientists, python hunters and the Miccosuke Tribe to eliminate invasive species.

Peek inside a cloud-inspired library in Canada that's built over a live railway; see how clever engineering helped a huge Seattle skyscraper go up without harming its iconic neighbour, then cross an Australian bridge that floats above a busy river.

The German war industry urgently needs more iron; Hitler has his eye on the Norwegian coast and especially on the harbor of Narvik, through which iron ore is shipped from Sweden.

Mike works with the Army Corps of Engineers on a massive project to restore essential flow of fresh water to the Florida Everglades. He also joins scientists, python hunters and the Miccosuke Tribe to eliminate invasive species.

Peek inside a cloud-inspired library in Canada that's built over a live railway; see how clever engineering helped a huge Seattle skyscraper go up without harming its iconic neighbour, then cross an Australian bridge that floats above a busy river.

The German war industry urgently needs more iron; Hitler has his eye on the Norwegian coast and especially on the harbor of Narvik, through which iron ore is shipped from Sweden.

A Russian-designed symbol of French pride and the Art Deco luxury that made it the most expensive ocean liner ever built; the fire that sank her in 1942, which may have been an act of Nazi sabotage.

Mike works with the Army Corps of Engineers on a massive project to restore essential flow of fresh water to the Florida Everglades. He also joins scientists, python hunters and the Miccosuke Tribe to eliminate invasive species.

Peek inside a cloud-inspired library in Canada that's built over a live railway; see how clever engineering helped a huge Seattle skyscraper go up without harming its iconic neighbour, then cross an Australian bridge that floats above a busy river.

The German war industry urgently needs more iron; Hitler has his eye on the Norwegian coast and especially on the harbor of Narvik, through which iron ore is shipped from Sweden.

St. John's Newfoundland and the Avalon peninsula to the unique islands.

Strange aquatic mammals populating a river in Columbia; a ship marooned in a sea of sand along Namibia's notorious Skeleton Coast; a Boeing 727 jetliner hidden in a pine forest; an unusual pattern is discovered in the Nevada desert.

The vast majority of information being gathered about Mars is by orbiters chronicling everything they can.

Exploring the Milky Way from the mythology of ancient sky watchers to how scientists are mapping it from the inside out.

St. John's Newfoundland and the Avalon peninsula to the unique islands.

Strange aquatic mammals populating a river in Columbia; a ship marooned in a sea of sand along Namibia's notorious Skeleton Coast; a Boeing 727 jetliner hidden in a pine forest; an unusual pattern is discovered in the Nevada desert.

The vast majority of information being gathered about Mars is by orbiters chronicling everything they can.

Exploring the Milky Way from the mythology of ancient sky watchers to how scientists are mapping it from the inside out.

A look at recent events in the castle, from the fire that started in the Private Chapel in 1992, through to the Queen's 90th birthday in 2016, a year in which she invited the Obamas to visit her "favorite home.".

A volcanic eruption in A.D. 79 that destroyed the Roman town of Pompeii, one of the world's most iconic sites.

A look at recent events in the castle, from the fire that started in the Private Chapel in 1992, through to the Queen's 90th birthday in 2016, a year in which she invited the Obamas to visit her "favorite home.".

A volcanic eruption in A.D. 79 that destroyed the Roman town of Pompeii, one of the world's most iconic sites.

Mike works with the Army Corps of Engineers on a massive project to restore essential flow of fresh water to the Florida Everglades. He also joins scientists, python hunters and the Miccosuke Tribe to eliminate invasive species.

Peek inside a cloud-inspired library in Canada that's built over a live railway; see how clever engineering helped a huge Seattle skyscraper go up without harming its iconic neighbour, then cross an Australian bridge that floats above a busy river.

Two crowd pleasing repurposing projects: an abandoned malthouse is transformed into a concert hall with intoxicating acoustics and a retired 747 Jumbo Jet swaps high flying days for high class stays.

An exploration of China's first emperor's mausoleum, highlighted by 8,000 terra-cotta warriors who guard the royal tomb.

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

Two crowd pleasing repurposing projects: an abandoned malthouse is transformed into a concert hall with intoxicating acoustics and a retired 747 Jumbo Jet swaps high flying days for high class stays.

An exploration of China's first emperor's mausoleum, highlighted by 8,000 terra-cotta warriors who guard the royal tomb.

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

Mapping the zigzagging path of a floating palace as it ferries U.S. troops to Europe during World War II; witnessing her smooth transition to peacetime cruise ship and mourning her disastrous end after she was sold to a Hong Kong shipping tycoon.

Two crowd pleasing repurposing projects: an abandoned malthouse is transformed into a concert hall with intoxicating acoustics and a retired 747 Jumbo Jet swaps high flying days for high class stays.

An exploration of China's first emperor's mausoleum, highlighted by 8,000 terra-cotta warriors who guard the royal tomb.

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

From St. John's heading north, the coastline is a maze of bays and inlets.

Dive into the historical and natural secrets of the deep; explore an uninhabited concrete island, ocean spirals off the Australian coast, underwater evidence of a violent past and tracks thousands of metres below the sea's surface.

Examining the science behind the birth of the universe.

Mercury, one of the nearest planets to earth, has eluded astronomers' best efforts to learn its secrets until missions like Mariner and Messenger.

The vast majority of information being gathered about Mars is by orbiters chronicling everything they can.

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Dive into the historical and natural secrets of the deep; explore an uninhabited concrete island, ocean spirals off the Australian coast, underwater evidence of a violent past and tracks thousands of metres below the sea's surface.

Examining the science behind the birth of the universe.

Mercury, one of the nearest planets to earth, has eluded astronomers' best efforts to learn its secrets until missions like Mariner and Messenger.

Windsor was the safe haven that kept Princess Elizabeth and her sister Margaret safe during the war, and it is where Elizabeth fell in love with Prince Philip.

World-famous mammoth expert Dick Mol traces the history of woolly mammoths.

An intercontinental astronomy project in the desert of Chile.

Windsor was the safe haven that kept Princess Elizabeth and her sister Margaret safe during the war, and it is where Elizabeth fell in love with Prince Philip.

World-famous mammoth expert Dick Mol traces the history of woolly mammoths.

A U.S. Parachute Infantry Regiment rushes to protect a critical bridge from a Nazi battle group during the opening days of the Battle of the Bulge.

Two crowd pleasing repurposing projects: an abandoned malthouse is transformed into a concert hall with intoxicating acoustics and a retired 747 Jumbo Jet swaps high flying days for high class stays.

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

Trace the paths of legendary Norsemen as experts recreate a huge Viking ship.

Unlock an abandoned site on a remote Antarctic isle and check out mysterious shapes in the Finnish snow; puzzle over an inexplicable monolith in the far reaches of Norway, then get shocked by a blood-red frozen waterfall at the bottom of the world.

The ancient necropolis of Abusir contains strange megastructures unlike any discovered in Egypt; experts gain rare access to investigate lost tombs and forgotten rituals to reveal the secrets of Egypt's Sun Cult pharaohs.

Trace the paths of legendary Norsemen as experts recreate a huge Viking ship.

Unlock an abandoned site on a remote Antarctic isle and check out mysterious shapes in the Finnish snow; puzzle over an inexplicable monolith in the far reaches of Norway, then get shocked by a blood-red frozen waterfall at the bottom of the world.

The ancient necropolis of Abusir contains strange megastructures unlike any discovered in Egypt; experts gain rare access to investigate lost tombs and forgotten rituals to reveal the secrets of Egypt's Sun Cult pharaohs.

The pride and joy of Benito Mussolini's fleet, which was once the fastest liner on the Atlantic; discovering why she was never turned into a troop ship during the war, but remained a target for the Allies, who sank her after Italy surrendered.

Trace the paths of legendary Norsemen as experts recreate a huge Viking ship.

Unlock an abandoned site on a remote Antarctic isle and check out mysterious shapes in the Finnish snow; puzzle over an inexplicable monolith in the far reaches of Norway, then get shocked by a blood-red frozen waterfall at the bottom of the world.

The ancient necropolis of Abusir contains strange megastructures unlike any discovered in Egypt; experts gain rare access to investigate lost tombs and forgotten rituals to reveal the secrets of Egypt's Sun Cult pharaohs.

From the waters of Juan de Fuca Strait to Gulf Islands National Park Reserve.

Revealing the truth behind the planet's ancient legends; touring an island covered in polar bears, twin craters in Greece, peeking at a supervolcano hidden under Yellowstone Park and examining an ocean formation that's eerily similar to Atlantis.

Examining how cosmic rays are produced and what that can tell us about the universe.

The Fermi Paradox asks why another civilization has not presented itself.

From the waters of Juan de Fuca Strait to Gulf Islands National Park Reserve.

Revealing the truth behind the planet's ancient legends; touring an island covered in polar bears, twin craters in Greece, peeking at a supervolcano hidden under Yellowstone Park and examining an ocean formation that's eerily similar to Atlantis.

Examining how cosmic rays are produced and what that can tell us about the universe.

The Fermi Paradox asks why another civilization has not presented itself.

As the family made Windsor their home, Philip grew restless; Elizabeth assigned him as ranger of Windsor Great Park, but that only led to more problems.

Egyptologists investigate rumors that the discovery of King Tutankhamun's tomb unleashed a deadly curse.

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.

As the family made Windsor their home, Philip grew restless; Elizabeth assigned him as ranger of Windsor Great Park, but that only led to more problems.

Egyptologists investigate rumors that the discovery of King Tutankhamun's tomb unleashed a deadly curse.

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

Unlock an abandoned site on a remote Antarctic isle and check out mysterious shapes in the Finnish snow; puzzle over an inexplicable monolith in the far reaches of Norway, then get shocked by a blood-red frozen waterfall at the bottom of the world.

The ancient necropolis of Abusir contains strange megastructures unlike any discovered in Egypt; experts gain rare access to investigate lost tombs and forgotten rituals to reveal the secrets of Egypt's Sun Cult pharaohs.

On the evening of May 3, 1999, the residents of Oklahoma City were hit with a devastating tornado.

The inside story of the F-86 Sabre, one of America's first fighter jets, and its epic battles against the Soviet MiG jet during the Korean War and beyond.

In February 1945, Allied forces lead an attack out of the Netherlands and onto German soil west of the Rhine; a Canadian battalion administrator must assume command of a company and lead it into battle.

On the evening of May 3, 1999, the residents of Oklahoma City were hit with a devastating tornado.

The inside story of the F-86 Sabre, one of America's first fighter jets, and its epic battles against the Soviet MiG jet during the Korean War and beyond.

In February 1945, Allied forces lead an attack out of the Netherlands and onto German soil west of the Rhine; a Canadian battalion administrator must assume command of a company and lead it into battle.

Two women designers construct one of the longest-serving liners in history; the dramatic shipwreck in the Canary Islands.

On the evening of May 3, 1999, the residents of Oklahoma City were hit with a devastating tornado.

The inside story of the F-86 Sabre, one of America's first fighter jets, and its epic battles against the Soviet MiG jet during the Korean War and beyond.

In February 1945, Allied forces lead an attack out of the Netherlands and onto German soil west of the Rhine; a Canadian battalion administrator must assume command of a company and lead it into battle.

A rich mix of coastal towns, islands, inland mountains and seascapes from Nanaimo to Campbell River.

Walking among colossal wonders scattered across the Earth's surface, including an ancient reptile skeleton, a massive head carving in the Alberta badlands, a giant South African footprint and a pentagram etched into a remote peninsula in Kazakhstan.

Examining Landsat 8, the advanced planetary explorer with a 900 million dollar price tag, which is designed to reveal complex and ever-changing details undetectable by the human eye.

A vehicle the size of a small car spent a year on Mars.

A rich mix of coastal towns, islands, inland mountains and seascapes from Nanaimo to Campbell River.

Walking among colossal wonders scattered across the Earth's surface, including an ancient reptile skeleton, a massive head carving in the Alberta badlands, a giant South African footprint and a pentagram etched into a remote peninsula in Kazakhstan.

An elite group of British paratroopers launch a midnight raid in order to capture Hitler's unusual radar equipment.

The inside story of the Avro Lancaster, the British bomber that was rushed into service to fight back against Nazi Germany.

An elite group of British paratroopers launch a midnight raid in order to capture Hitler's unusual radar equipment.

Navigating the narrow, deep fjords that lead to Narvik, Norway, where German and British forces faced off in April 1940; repeated torpedo failures threatened to sink the mission and leave Hitler's invading troops exposed and vulnerable.

Learning why a clash over Nazi ideology wrecked a bright U-boat commander's career.

Retracing the steps of a German U-boat that's willing to do anything to replace its dwindling fuel and food stores, and get back to port; examining how the crew, plagued by scurvy, turns the tables on the US submarines that try to ram their ship.

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.

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.