Learn if a perfect storm of drought, earthquakes, and disease made cities fall.

Dig up an epic find in South Dakota that fuels suspicion and misfortune, then examine an Egyptian boy king's tomb plagued by an ancient curse. Study a haunted English painting and ponder a relic coveted by a king that may have doomed his reign.

Visiting the heart of history in the Dashur necropolis, where the first of the great pyramids was built; examining what a mini-scanner called a LiDAR reveals about this landmark's enduring mysteries.

Experts go on a search for New York's most remarkable hidden stories, involving the Statue of Liberty, the 21 Club, and "Typhoid Mary.".

Learn if a perfect storm of drought, earthquakes, and disease made cities fall.

Dig up an epic find in South Dakota that fuels suspicion and misfortune, then examine an Egyptian boy king's tomb plagued by an ancient curse. Study a haunted English painting and ponder a relic coveted by a king that may have doomed his reign.

Visiting the heart of history in the Dashur necropolis, where the first of the great pyramids was built; examining what a mini-scanner called a LiDAR reveals about this landmark's enduring mysteries.

Venus offers a complex story with its thick atmosphere and a substantial amount of matter.

Earth's closest neighbor, the moon, is the cosmic stepping stone to a future with the planets.

Get the inside scoop on a Michelin-star meal that's less than three dollars; learn the history of hawker food; get a personal tour from Toilet Man to learn how beautiful gardens and obsessively clean toilets made the city rich.

In the wake of the Spanish flu, the 1920s became the decade of flappers, jazz, and the speakeasy; for many, it was a time of unprecedented opportunity.

The inside track on five of the greatest heists in history; these are not petty robberies, but high-stakes operations meticulously planned and audaciously executed, with a cast of colorful characters from the mastermind to the snitch.

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

An exploration of little-known stories behind San Francisco landmarks and locations, including its golden fire hydrant and Dutch windmills.

Jackie Kennedy's crucial role in the Kennedy years; Dolley Madison's role; Nancy Reagan's role as a First Lady.

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

The engineers who built the Apollo Lunar Module, which allowed astronauts to land on the moon and then launch back into orbit.

Jackie Kennedy's crucial role in the Kennedy years; Dolley Madison's role; Nancy Reagan's role as a First Lady.

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

Get insight into one of the war's most hazardous jobs: piloting aircraft. Explore the constant race to provide more aerial firepower, revisit one of the war's most daring raids, and hear from a glider pilot who risked it all the night before D-Day.

Learn if a perfect storm of drought, earthquakes, and disease made cities fall.

Visiting the heart of history in the Dashur necropolis, where the first of the great pyramids was built; examining what a mini-scanner called a LiDAR reveals about this landmark's enduring mysteries.

A strange sea fortress that guards icy waters is home to a grim secret; experts investigate the mysteries at this eerie structure, which fought an invisible enemy far more deadly than ever imagined.

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.

The Avenue of the Sphinxes has now been unearthed in the biggest excavation in Egyptian history; using cutting-edge CGI, investigators reveal the hidden secrets of the sphinxes.

A strange sea fortress that guards icy waters is home to a grim secret; experts investigate the mysteries at this eerie structure, which fought an invisible enemy far more deadly than ever imagined.

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.

The Avenue of the Sphinxes has now been unearthed in the biggest excavation in Egyptian history; using cutting-edge CGI, investigators reveal the hidden secrets of the sphinxes.

An exploration of little-known stories behind San Francisco landmarks and locations, including its golden fire hydrant and Dutch windmills.

A strange sea fortress that guards icy waters is home to a grim secret; experts investigate the mysteries at this eerie structure, which fought an invisible enemy far more deadly than ever imagined.

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.

The Avenue of the Sphinxes has now been unearthed in the biggest excavation in Egyptian history; using cutting-edge CGI, investigators reveal the hidden secrets of the sphinxes.

A fleet of spacecraft orbits, and sometimes lands on the surface of, Mars.

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

A vanished Neolithic structure in an Irish farmer's field, an ancient oasis in the remote reaches of a Chinese desert, a centuries-old buried treasure in the U.K. and a dreaded predator in the Pacific Ocean are discovered by accident using drones.

Finding out how the insidious 'standard man' makes it hard to find a place where the gap doesn't impact us.

The Amazon rainforest is one of the enduring mysteries of the natural world.

The history of skyscrapers is the history of American cities, technological ingenuity, and a global boom in urbanization; from west to east, from five stories up to one kilometer high, there's nowhere to go but up.

A tour of London exploring objects with secret histories, including its black cabs, the Marble Arch and the Horse Guards Clock.

Lady Bird Johnson, Edith Roosevelt and Betty Ford inherited the role of First Lady by chance during times when the nation was looking for stability.

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

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

Lady Bird Johnson, Edith Roosevelt and Betty Ford inherited the role of First Lady by chance during times when the nation was looking for stability.

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

By the spring of 1945, the United States begins to take back the Philippines; on Borneo, the Australians invade Labuan; when the United States invades Okinawa, Japan makes a strong stand and launches the biggest kamikaze attacks of the war.

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.

The Avenue of the Sphinxes has now been unearthed in the biggest excavation in Egyptian history; using cutting-edge CGI, investigators reveal the hidden secrets of the sphinxes.

The May 18, 1980 volcanic eruption of Mount St. Helens in Skamania County, Washington; the volcano's first eruption in over a century.

First-hand accounts, recreations and expert interviews of the battle of Dunkirk, and how soldiers were trapped on the French beach by German forces.

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

The May 18, 1980 volcanic eruption of Mount St. Helens in Skamania County, Washington; the volcano's first eruption in over a century.

First-hand accounts, recreations and expert interviews of the battle of Dunkirk, and how soldiers were trapped on the French beach by German forces.

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

A tour of London exploring objects with secret histories, including its black cabs, the Marble Arch and the Horse Guards Clock.

The May 18, 1980 volcanic eruption of Mount St. Helens in Skamania County, Washington; the volcano's first eruption in over a century.

First-hand accounts, recreations and expert interviews of the battle of Dunkirk, and how soldiers were trapped on the French beach by German forces.

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

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.

Unlock military secrets from the air; spot a Nazi weapon designed to turn the tides of war in France; a covert Russian military tower in Chernobyl's shadow; a rumoured nuclear lab buried in Australia; a hush-hush surprise underneath Alcatraz.

Discovering what it takes to become an astronaut, blasting into outer space at 17,000 mph.

Genghis Khan is responsible for over 40 million deaths; 16 million people carry his personal DNA.

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

Immerse yourself in the Roaring Twenties inside a hidden art deco grocery store that was once an LGBTQ+ club and a secret Nazi hangout; learn how the city's most popular street food, currywurst, emerged from the ruins of the Second World War.

By the spring of 1945, the United States begins to take back the Philippines; on Borneo, the Australians invade Labuan; when the United States invades Okinawa, Japan makes a strong stand and launches the biggest kamikaze attacks of the war.

President Harry Truman decides to drop the atomic bomb on Hiroshima and Nagasaki; Emperor Hirohito surrenders, and Gen. Douglas MacArthur arrives to oversee the country's occupation; mortal enemies must now become partners in Japan's rebirth.

Sit down with civilians who got caught in the crossfire; learn how an 11-year-old Jewish boy hid from the Nazis; meet an unjustly imprisoned Japanese-American who served his country; relive a young woman's Blitz experience.

Uncover the luck and determination that helped POWs endure captivity, hunger, and acts of unthinkable brutality. Listen to the riveting stories of soldiers who survived infamous German stalags, Japanese forced-labour campaigns, and death marches.

Get insight into one of the war's most hazardous jobs: piloting aircraft. Explore the constant race to provide more aerial firepower, revisit one of the war's most daring raids, and hear from a glider pilot who risked it all the night before D-Day.

The May 18, 1980 volcanic eruption of Mount St. Helens in Skamania County, Washington; the volcano's first eruption in over a century.

Exploring the many battles fought out on the banks of the Rhine in 1944 and the secrets behind the lines of the battleground.

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.

Rare archive footage charts the German Army in 1940 as it unleashes a new Blitzkrieg tactic.

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.

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

Rare archive footage charts the German Army in 1940 as it unleashes a new Blitzkrieg tactic.

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.

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

Immerse yourself in the Roaring Twenties inside a hidden art deco grocery store that was once an LGBTQ+ club and a secret Nazi hangout; learn how the city's most popular street food, currywurst, emerged from the ruins of the Second World War.

Rare archive footage charts the German Army in 1940 as it unleashes a new Blitzkrieg tactic.

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.

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

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.

Over a hundred big concrete arrows scattered across the U.S.; a giant chalk figure with an oversized phallus on an English hillside; a mysterious hole in the middle of a lake in Southern California.

Experts go on a search for New York's most remarkable hidden stories, involving the Statue of Liberty, the 21 Club, and "Typhoid Mary.".

An exploration of little-known stories behind San Francisco landmarks and locations, including its golden fire hydrant and Dutch windmills.

A tour of London exploring objects with secret histories, including its black cabs, the Marble Arch and the Horse Guards Clock.

Walk the cobblestone streets and take in the city's urban design to uncover the key to it's revolutionary past; discover why tourists should skip the Eiffel Tower and climb the ugliest skyscraper in Europe instead.

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

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

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

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

Rare archive footage charts the German Army in 1940 as it unleashes a new Blitzkrieg tactic.

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.

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

A medical helicopter flies over rush hour traffic to collect a patient, the search is on for a lost elephant, engineers race to fix a chopper, and airline pilots fly to one of the world's most dangerous runways.

In the Alps of Switzerland, Mike helps an elite team install a new cable (rope) system on an iconic mountain gondola line, helps fix the world's steepest cogwheel railway track and explores mountaintop family farms only accessib.

Learn how astronauts constructed the International Space Station while circling the Earth at 17,500 miles per hour; look at the meteorproof ship's power source and unique water-recycling technology; discover why it almost wasn't built at all.

A medical helicopter flies over rush hour traffic to collect a patient, the search is on for a lost elephant, engineers race to fix a chopper, and airline pilots fly to one of the world's most dangerous runways.

In the Alps of Switzerland, Mike helps an elite team install a new cable (rope) system on an iconic mountain gondola line, helps fix the world's steepest cogwheel railway track and explores mountaintop family farms only accessib.

Learn how astronauts constructed the International Space Station while circling the Earth at 17,500 miles per hour; look at the meteorproof ship's power source and unique water-recycling technology; discover why it almost wasn't built at all.

Walk the cobblestone streets and take in the city's urban design to uncover the key to it's revolutionary past; discover why tourists should skip the Eiffel Tower and climb the ugliest skyscraper in Europe instead.

A medical helicopter flies over rush hour traffic to collect a patient, the search is on for a lost elephant, engineers race to fix a chopper, and airline pilots fly to one of the world's most dangerous runways.

In the Alps of Switzerland, Mike helps an elite team install a new cable (rope) system on an iconic mountain gondola line, helps fix the world's steepest cogwheel railway track and explores mountaintop family farms only accessib.

Learn how astronauts constructed the International Space Station while circling the Earth at 17,500 miles per hour; look at the meteorproof ship's power source and unique water-recycling technology; discover why it almost wasn't built at all.

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.

A Turkish drought reveals a long-lost ancient Basilica and its secrets; a church spire punches through the surface of a toxic sludge in Romania; the hull of a massive ship in the North Sea answers decades old questions.

Immerse yourself in the Roaring Twenties inside a hidden art deco grocery store that was once an LGBTQ+ club and a secret Nazi hangout; learn how the city's most popular street food, currywurst, emerged from the ruins of the Second World War.

Walk the cobblestone streets and take in the city's urban design to uncover the key to it's revolutionary past; discover why tourists should skip the Eiffel Tower and climb the ugliest skyscraper in Europe instead.

Get the inside scoop on a Michelin-star meal that's less than three dollars; learn the history of hawker food; get a personal tour from Toilet Man to learn how beautiful gardens and obsessively clean toilets made the city rich.

Get the inside scoop on a Michelin-star meal that's less than three dollars; learn the history of hawker food; get a personal tour from Toilet Man to learn how beautiful gardens and obsessively clean toilets made the city rich.

Mary Lincoln, Eleanor Roosevelt and Laura Bush's role as First Ladies in calming the nation in times of war.

Clive Anderson and Mary-Ann Ochota test outrageous remedies like leeches, head-drilling, and a pigeon that cures the plague; Henry VIII's role in Tudor medicine.

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

Mary Lincoln, Eleanor Roosevelt and Laura Bush's role as First Ladies in calming the nation in times of war.

Clive Anderson and Mary-Ann Ochota test outrageous remedies like leeches, head-drilling, and a pigeon that cures the plague; Henry VIII's role in Tudor medicine.

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

A strange sea fortress that guards icy waters is home to a grim secret; experts investigate the mysteries at this eerie structure, which fought an invisible enemy far more deadly than ever imagined.

Dig up an epic find in South Dakota that fuels suspicion and misfortune, then examine an Egyptian boy king's tomb plagued by an ancient curse. Study a haunted English painting and ponder a relic coveted by a king that may have doomed his reign.

A sky-high tour over Ireland reveals its towering cliffs, rolling hills, ancient ruins, and rich history.

The arrival of U.S. evacuees escaping the coronavirus outbreak in China; a daring helicopter airlift; punishing snow.

A mysterious engine fault delays a new airliner; scientists fly into the bush to hunt a killer disease; a broken-down plane closes a major runway, and a snake hunt across the airport ends in a face-off with a spitting cobra.

A sky-high tour over Ireland reveals its towering cliffs, rolling hills, ancient ruins, and rich history.

The arrival of U.S. evacuees escaping the coronavirus outbreak in China; a daring helicopter airlift; punishing snow.

A mysterious engine fault delays a new airliner; scientists fly into the bush to hunt a killer disease; a broken-down plane closes a major runway, and a snake hunt across the airport ends in a face-off with a spitting cobra.

Get the inside scoop on a Michelin-star meal that's less than three dollars; learn the history of hawker food; get a personal tour from Toilet Man to learn how beautiful gardens and obsessively clean toilets made the city rich.

The arrival of U.S. evacuees escaping the coronavirus outbreak in China; a daring helicopter airlift; punishing snow.

A mysterious engine fault delays a new airliner; scientists fly into the bush to hunt a killer disease; a broken-down plane closes a major runway, and a snake hunt across the airport ends in a face-off with a spitting cobra.

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.

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.

In the wake of the Spanish flu, the 1920s became the decade of flappers, jazz, and the speakeasy; for many, it was a time of unprecedented opportunity.

The inside track on five of the greatest heists in history; these are not petty robberies, but high-stakes operations meticulously planned and audaciously executed, with a cast of colorful characters from the mastermind to the snitch.

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.

Stories of ghost towns, including Pripyat and Hashima Island.

A look at how first ladies have changed their role through activism, brains and toughness.

Clive Anderson and Mary-Ann Ochota investigate one of Britain's sinister mysteries: decapitated bodies in gruesome poses, warrior kings with tiny heads and killer cake.

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.

A look at how first ladies have changed their role through activism, brains and toughness.

Clive Anderson and Mary-Ann Ochota investigate one of Britain's sinister mysteries: decapitated bodies in gruesome poses, warrior kings with tiny heads and killer cake.

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

The arrival of U.S. evacuees escaping the coronavirus outbreak in China; a daring helicopter airlift; punishing snow.

A mysterious engine fault delays a new airliner; scientists fly into the bush to hunt a killer disease; a broken-down plane closes a major runway, and a snake hunt across the airport ends in a face-off with a spitting cobra.

In the Alps of Switzerland, Mike helps an elite team install a new cable (rope) system on an iconic mountain gondola line, helps fix the world's steepest cogwheel railway track and explores mountaintop family farms only accessib.

Learn how astronauts constructed the International Space Station while circling the Earth at 17,500 miles per hour; look at the meteorproof ship's power source and unique water-recycling technology; discover why it almost wasn't built at all.

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.

In the Alps of Switzerland, Mike helps an elite team install a new cable (rope) system on an iconic mountain gondola line, helps fix the world's steepest cogwheel railway track and explores mountaintop family farms only accessib.

Learn how astronauts constructed the International Space Station while circling the Earth at 17,500 miles per hour; look at the meteorproof ship's power source and unique water-recycling technology; discover why it almost wasn't built at all.

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.

Stories of ghost towns, including Pripyat and Hashima Island.

In the Alps of Switzerland, Mike helps an elite team install a new cable (rope) system on an iconic mountain gondola line, helps fix the world's steepest cogwheel railway track and explores mountaintop family farms only accessib.

Learn how astronauts constructed the International Space Station while circling the Earth at 17,500 miles per hour; look at the meteorproof ship's power source and unique water-recycling technology; discover why it almost wasn't built at all.

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.

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.

Strange markings in the remote reaches of Northern Finland; drones find a Manhattan-sized mystery in the depths of a Vietnamese cave; secrets are no longer hidden in the Antarctic; a lost sky-high world in Mozambique gets a visit from above.

Finding out how the standard man makes it hard to find a place where the gap doesn't impact us.

The Amazon rainforest is one of the most enduring mysteries of the natural world.

A journey along Ireland's longest river, the Shannon, through an emerald green landscape of rolling hills and sparkling waters; how Vikings, monks and kings have all made their mark.

The U.S. gains information about space borders using unwanted battleship guns; a V2 rocket is developed from the remains of a secret Nazi base.

The new masters of the universe refuse to limit their imaginations, exploring space tourism, asteroid mining and colonies on Mars.

Clive and Mary-Ann investigate rude Viking graffiti, sinister burials, and potent potions, looking to solve 34,000 years of mystic mysteries, from King Arthur to Nessie and the Wicker Man.

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.

The new masters of the universe refuse to limit their imaginations, exploring space tourism, asteroid mining and colonies on Mars.

Clive and Mary-Ann investigate rude Viking graffiti, sinister burials, and potent potions, looking to solve 34,000 years of mystic mysteries, from King Arthur to Nessie and the Wicker Man.

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

In the Alps of Switzerland, Mike helps an elite team install a new cable (rope) system on an iconic mountain gondola line, helps fix the world's steepest cogwheel railway track and explores mountaintop family farms only accessib.

Learn how astronauts constructed the International Space Station while circling the Earth at 17,500 miles per hour; look at the meteorproof ship's power source and unique water-recycling technology; discover why it almost wasn't built at all.

Discover how an invasion set the stage for collapse in the era's great cities.

Stumble upon the largest Anglo-Saxon hoard in the wake of an ominous storm, then assess a precious stone's bloody curse. Discover the unforeseen consequences of disturbing an immortal Chinese army and get mesmerized by a divisive Egyptian sculpture.

Takes an unprecedented look inside the secret chambers of the Great Pyramid of Giza, the only one of the Seven Wonders of the Ancient World still standing, and see what they reveal about the pyramid's origins.

Discover how an invasion set the stage for collapse in the era's great cities.

Stumble upon the largest Anglo-Saxon hoard in the wake of an ominous storm, then assess a precious stone's bloody curse. Discover the unforeseen consequences of disturbing an immortal Chinese army and get mesmerized by a divisive Egyptian sculpture.

Takes an unprecedented look inside the secret chambers of the Great Pyramid of Giza, the only one of the Seven Wonders of the Ancient World still standing, and see what they reveal about the pyramid's origins.

The U.S. gains information about space borders using unwanted battleship guns; a V2 rocket is developed from the remains of a secret Nazi base.

Discover how an invasion set the stage for collapse in the era's great cities.

Stumble upon the largest Anglo-Saxon hoard in the wake of an ominous storm, then assess a precious stone's bloody curse. Discover the unforeseen consequences of disturbing an immortal Chinese army and get mesmerized by a divisive Egyptian sculpture.

Takes an unprecedented look inside the secret chambers of the Great Pyramid of Giza, the only one of the Seven Wonders of the Ancient World still standing, and see what they reveal about the pyramid's origins.

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.

Drones reveal what's left of Henry Ford's American suburb in the Brazilian jungle; looking for clues to what killed a once-vibrant Pennsylvania mining town; an aerial glimpse of New York's forgotten ghost town; an Italian Renaissance reduced to dust.

The best kept secrets of Nova Scotia.

Nova Scotia's Southern coast.

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

The history of a stretch of concrete known as Hitler's Bridge; the highest bridge in the world collapses.

We examine the life of the Nine Days Queen as the Tower prepares for a ceremony on the anniversary of her execution in 1554.

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

An intercontinental astronomy project in the desert of Chile.

We examine the life of the Nine Days Queen as the Tower prepares for a ceremony on the anniversary of her execution in 1554.

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

The history of the mean and ugly jet aircraft, the A-10 Warthog.

Discover how an invasion set the stage for collapse in the era's great cities.

Takes an unprecedented look inside the secret chambers of the Great Pyramid of Giza, the only one of the Seven Wonders of the Ancient World still standing, and see what they reveal about the pyramid's origins.

An massive, alien-like fortress built into a mountainside is the central node to a network of pipelines that race outwards like tentacles; behind-the-scenes access reveals the secrets of why this strange complex was built and why it was abandoned.

Tower over amazing metropolises. Learn why an important urban centre is sinking toward oblivion, soar over sprawling ruins buried under Saharan sands, learn the modern secret of an ancient fortress, and eye a ghost town on the edge of the Gobi.

Palmyra: pearl of the Syrian desert; experts return to the site and use CGI reconstruction to reveal the secrets of Palmyra's ancient engineers.

An massive, alien-like fortress built into a mountainside is the central node to a network of pipelines that race outwards like tentacles; behind-the-scenes access reveals the secrets of why this strange complex was built and why it was abandoned.

Tower over amazing metropolises. Learn why an important urban centre is sinking toward oblivion, soar over sprawling ruins buried under Saharan sands, learn the modern secret of an ancient fortress, and eye a ghost town on the edge of the Gobi.

Palmyra: pearl of the Syrian desert; experts return to the site and use CGI reconstruction to reveal the secrets of Palmyra's ancient engineers.

The history of a stretch of concrete known as Hitler's Bridge; the highest bridge in the world collapses.

An massive, alien-like fortress built into a mountainside is the central node to a network of pipelines that race outwards like tentacles; behind-the-scenes access reveals the secrets of why this strange complex was built and why it was abandoned.

Tower over amazing metropolises. Learn why an important urban centre is sinking toward oblivion, soar over sprawling ruins buried under Saharan sands, learn the modern secret of an ancient fortress, and eye a ghost town on the edge of the Gobi.

Palmyra: pearl of the Syrian desert; experts return to the site and use CGI reconstruction to reveal the secrets of Palmyra's ancient engineers.

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.

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.

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

An aerial view of Cape Breton Island from the Canso Causeway to the Cape Breton Highlands.

Northumberland Strait.

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

An inside look at gruesome history of the White Tower, the tragic relationship of Henry VIII and Anne Boleyn, and what it's like to work in London's oldest building.

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.

An inside look at gruesome history of the White Tower, the tragic relationship of Henry VIII and Anne Boleyn, and what it's like to work in London's oldest building.

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

Electronic warfare aircraft; the EA-6B Prowler; the EA-18G Growler.

Tower over amazing metropolises. Learn why an important urban centre is sinking toward oblivion, soar over sprawling ruins buried under Saharan sands, learn the modern secret of an ancient fortress, and eye a ghost town on the edge of the Gobi.

Palmyra: pearl of the Syrian desert; experts return to the site and use CGI reconstruction to reveal the secrets of Palmyra's ancient engineers.

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

First-hand accounts, re-creations and expert interviews of D-Day in 1944, where the Allied Forces of Britain, America, Canada and France attacked German forces on the coast of Normandy, France.

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

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

First-hand accounts, re-creations and expert interviews of D-Day in 1944, where the Allied Forces of Britain, America, Canada and France attacked German forces on the coast of Normandy, France.

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

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

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

First-hand accounts, re-creations and expert interviews of D-Day in 1944, where the Allied Forces of Britain, America, Canada and France attacked German forces on the coast of Normandy, France.

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

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.

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.

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

The natural wonders of the Gaspe Peninsula.

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

A look at disused structures that used to be at the forefront of the world's power supply, including Budapest's Kelenfold Power Station and New York's Wardenclyffe Tower.

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

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

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

The history of the mean and ugly jet aircraft, the A-10 Warthog.

Electronic warfare aircraft; the EA-6B Prowler; the EA-18G Growler.

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

First-hand accounts, recreations and expert interviews of the battle of Dunkirk, and how soldiers were trapped on the French beach by German forces.

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