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.

A father and son team of bush aviators flies a NASA expedition into the wilderness. A rookie airline pilot attempts a landing on a remote island. A seaplane mechanic starts a helicopter repair business, and customs agents.

An epic, high-altitude journey from Seven Sisters Provincial Park to Salmon Glacier.

An epic, high-altitude journey from Seven Sisters Provincial Park to Salmon Glacier.

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.

An epic, high-altitude journey from Seven Sisters Provincial Park to Salmon Glacier.

An epic, high-altitude journey from Seven Sisters Provincial Park to Salmon Glacier.

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.

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.

On a warm summer night in July 1988, the Piper Alpha oil rig in the middle of the North Sea was the scene of the world's deadliest offshore accident.

The story of the world's first nuclear bomber, the B-29, and its explosive impact on aerial warfare.

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.

Allied and Axis forces push science and engineering to the limits to gain the upper hand; Aerial drone footage and Lidar technology uncover evidence of military aviation innovations that played roles in key conflicts of the European campaign.

Investigate the costs of Hitler's Soviet invasion, which aims to give the Nazis control over a key nickel mine and a transportation hub; seeing how this summer battle turns into a bitter winter war as the Allies tighten their grip on the Arctic.

A comprehensive look at the naval battle of Guadalcanal in November 1942 and the heroic efforts of U.S. sailors who held off powerful Imperial Navy.

Allied and Axis forces push science and engineering to the limits to gain the upper hand; Aerial drone footage and Lidar technology uncover evidence of military aviation innovations that played roles in key conflicts of the European campaign.

Investigate the costs of Hitler's Soviet invasion, which aims to give the Nazis control over a key nickel mine and a transportation hub; seeing how this summer battle turns into a bitter winter war as the Allies tighten their grip on the Arctic.

A comprehensive look at the naval battle of Guadalcanal in November 1942 and the heroic efforts of U.S. sailors who held off powerful Imperial Navy.

The German flagship Cap Arcona served as the set for the 1942 Nazi propaganda feature film "Titanic"; her end would be equally tragic, with an even greater loss of life.

Allied and Axis forces push science and engineering to the limits to gain the upper hand; Aerial drone footage and Lidar technology uncover evidence of military aviation innovations that played roles in key conflicts of the European campaign.

Investigate the costs of Hitler's Soviet invasion, which aims to give the Nazis control over a key nickel mine and a transportation hub; seeing how this summer battle turns into a bitter winter war as the Allies tighten their grip on the Arctic.

A comprehensive look at the naval battle of Guadalcanal in November 1942 and the heroic efforts of U.S. sailors who held off powerful Imperial Navy.

The creation legends of Naikoon Provincial Park; rich sea lion colonies; remote lighthouses.

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.

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.

The creation legends of Naikoon Provincial Park; rich sea lion colonies; remote lighthouses.

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.

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 look at how acts of resistance and rebellion during slavery paved the way to abolition.

The journeys of two actors confronting their personal connection to slavery.

Witness little-known stories of the global slave trade involving an African musician, Thomas Jefferson, and more.

A look at racial injustices before and after slavery was abolished and the struggles that continue today.

Incredible treasures left behind by the raiders that were never found are examined, revealing the source of Han's wealth and power.

Allied and Axis forces push science and engineering to the limits to gain the upper hand; Aerial drone footage and Lidar technology uncover evidence of military aviation innovations that played roles in key conflicts of the European campaign.

Investigate the costs of Hitler's Soviet invasion, which aims to give the Nazis control over a key nickel mine and a transportation hub; seeing how this summer battle turns into a bitter winter war as the Allies tighten their grip on the Arctic.

A comprehensive look at the naval battle of Guadalcanal in November 1942 and the heroic efforts of U.S. sailors who held off powerful Imperial Navy.

A father and son team of bush aviators flies a NASA expedition into the wilderness. A rookie airline pilot attempts a landing on a remote island. A seaplane mechanic starts a helicopter repair business, and customs agents.

Host Mike Davidson goes to the remote Atacama desert in Chile; at observatory ALMA he works alongside the expert team as they repair some of the world's biggest antennas.

Witness amazing buildings, bridges, lifts, and other structures that pushed structural concrete engineering to the edge.

A father and son team of bush aviators flies a NASA expedition into the wilderness. A rookie airline pilot attempts a landing on a remote island. A seaplane mechanic starts a helicopter repair business, and customs agents.

Host Mike Davidson goes to the remote Atacama desert in Chile; at observatory ALMA he works alongside the expert team as they repair some of the world's biggest antennas.

Witness amazing buildings, bridges, lifts, and other structures that pushed structural concrete engineering to the edge.

Investigators try to determine what caused a routine commuter flight to crash.

A father and son team of bush aviators flies a NASA expedition into the wilderness. A rookie airline pilot attempts a landing on a remote island. A seaplane mechanic starts a helicopter repair business, and customs agents.

Host Mike Davidson goes to the remote Atacama desert in Chile; at observatory ALMA he works alongside the expert team as they repair some of the world's biggest antennas.

Witness amazing buildings, bridges, lifts, and other structures that pushed structural concrete engineering to the edge.

A cultural and geological past told through the stunning landscape of Gwaii Haanas National Park Reserve.

Tourists explore the far reaches of northern Canada and gain exclusive access to polar bears on custom-built rovers; the Twin Otter aircraft drops much-needed supplies to isolated villages.

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 cultural and geological past told through the stunning landscape of Gwaii Haanas National Park Reserve.

East coast shipper creates a private fleet to seize American ships.

Paid programming.

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.

The most photographed woman in world from 1985 to 1997 suffered from hounding from paparazzi but also promoted the charitable and humanitarian causes she cared so passionately about.

In Jordan and Saudi Arabia, two cities, Petra and Hegra, are thought to have been centers of a "lost matriarchy.".

An up-close look at NASA's decades-long mission to reach and explore Mars, including its latest rover, the high-tech Perseverance.

The most photographed woman in world from 1985 to 1997 suffered from hounding from paparazzi but also promoted the charitable and humanitarian causes she cared so passionately about.

In Jordan and Saudi Arabia, two cities, Petra and Hegra, are thought to have been centers of a "lost matriarchy.".

A look at Naval warfare's fastest combat ships and how the advantage of speed determined the outcome of some of the great seas battles of the last 150 years.

The most photographed woman in world from 1985 to 1997 suffered from hounding from paparazzi but also promoted the charitable and humanitarian causes she cared so passionately about.

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

A cross-country flight over the nation's mountains, beaches and national parks; visiting other sites that attract adventurers and tourists.

Valentine's day delays loom when a squadron of F22 makes an unexpected landing; high winds threaten a helicopter's 600lb sling load; Aviators come to the rescue of a village without water.

A K9 anti-poaching squad flies into action, a heavy-lift helicopter flies emergency supply missions across a storm-ravaged island and an airliner races to reach its destination before a power outage plunges the airport into dark.

A cross-country flight over the nation's mountains, beaches and national parks; visiting other sites that attract adventurers and tourists.

Valentine's day delays loom when a squadron of F22 makes an unexpected landing; high winds threaten a helicopter's 600lb sling load; Aviators come to the rescue of a village without water.

A K9 anti-poaching squad flies into action, a heavy-lift helicopter flies emergency supply missions across a storm-ravaged island and an airliner races to reach its destination before a power outage plunges the airport into dark.

Two crashed Cessnas baffle investigators.

A cross-country flight over the nation's mountains, beaches and national parks; visiting other sites that attract adventurers and tourists.

Valentine's day delays loom when a squadron of F22 makes an unexpected landing; high winds threaten a helicopter's 600lb sling load; Aviators come to the rescue of a village without water.

A K9 anti-poaching squad flies into action, a heavy-lift helicopter flies emergency supply missions across a storm-ravaged island and an airliner races to reach its destination before a power outage plunges the airport into dark.

A wind farm depends on the all-terrain abilities of the Hagglund BV206 in Sweden.

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.

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 wind farm depends on the all-terrain abilities of the Hagglund BV206 in Sweden.

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

Paid programming.

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.

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

After the king of France targets the Knights Templar, they face imprisonment, torture and executions, but their legacy endures through present day.

Tourists explore the far reaches of northern Canada and gain exclusive access to polar bears on custom-built rovers; the Twin Otter aircraft drops much-needed supplies to isolated villages.

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

After the king of France targets the Knights Templar, they face imprisonment, torture and executions, but their legacy endures through present day.

A look at riverine warfare from the Civil War to Vietnam and small but powerful combat ships.

Valentine's day delays loom when a squadron of F22 makes an unexpected landing; high winds threaten a helicopter's 600lb sling load; Aviators come to the rescue of a village without water.

A K9 anti-poaching squad flies into action, a heavy-lift helicopter flies emergency supply missions across a storm-ravaged island and an airliner races to reach its destination before a power outage plunges the airport into dark.

Host Mike Davidson goes to the remote Atacama desert in Chile; at observatory ALMA he works alongside the expert team as they repair some of the world's biggest antennas.

Witness amazing buildings, bridges, lifts, and other structures that pushed structural concrete engineering to the edge.

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.

Host Mike Davidson goes to the remote Atacama desert in Chile; at observatory ALMA he works alongside the expert team as they repair some of the world's biggest antennas.

Witness amazing buildings, bridges, lifts, and other structures that pushed structural concrete engineering to the edge.

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.

Investigators determine why a plane crashes on Alaska's Kenai Peninsula.

Host Mike Davidson goes to the remote Atacama desert in Chile; at observatory ALMA he works alongside the expert team as they repair some of the world's biggest antennas.

Witness amazing buildings, bridges, lifts, and other structures that pushed structural concrete engineering to the edge.

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 special drone uses cutting-edge technology to fly deep into treacherous, hard-to-reach mountains on dangerous search and rescue missions, and a hi-tech ice machine works tirelessly at a Toronto airport to keep flights running in brutal conditions.

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

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 special drone uses cutting-edge technology to fly deep into treacherous, hard-to-reach mountains on dangerous search and rescue missions, and a hi-tech ice machine works tirelessly at a Toronto airport to keep flights running in brutal conditions.

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

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.

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.

Archaeologists discover a link between the prophecies of the oracles and seismic activity beneath Earth's surface.

A wind farm depends on the all-terrain abilities of the Hagglund BV206 in Sweden.

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.

Archaeologists discover a link between the prophecies of the oracles and seismic activity beneath Earth's surface.

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.

Host Mike Davidson goes to the remote Atacama desert in Chile; at observatory ALMA he works alongside the expert team as they repair some of the world's biggest antennas.

Witness amazing buildings, bridges, lifts, and other structures that pushed structural concrete engineering to the edge.

Looking at the engineering genius that's taken repurposing underground, from a rotting shipyard transformed into a subterranean museum to a rusting bank vault that serves cocktails.

The dramatic history of Princess Fu Hao, who rose from the leader of a warrior clan, to then become a key advisor, general and wife of King Wu Ding of the Shang Dynasty.

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

Looking at the engineering genius that's taken repurposing underground, from a rotting shipyard transformed into a subterranean museum to a rusting bank vault that serves cocktails.

The dramatic history of Princess Fu Hao, who rose from the leader of a warrior clan, to then become a key advisor, general and wife of King Wu Ding of the Shang Dynasty.

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 mystery emerges after a single-engine floatplane crashes.

Looking at the engineering genius that's taken repurposing underground, from a rotting shipyard transformed into a subterranean museum to a rusting bank vault that serves cocktails.

The dramatic history of Princess Fu Hao, who rose from the leader of a warrior clan, to then become a key advisor, general and wife of King Wu Ding of the Shang Dynasty.

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

Crawling down the Red River, the Amphibex protects those who live along it during the thaw, while the Hercules C-130 J takes to the Arctic skies of the Canadian North; preparing for summer exploratory missions is Swedish built icebreaker Oden.

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.

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

Paid programming.

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.

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.

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

A 4,000-year-old leather manuscript at the Cairo Museum sheds new light on The Book of the Dead from ancient Egypt.

A special drone uses cutting-edge technology to fly deep into treacherous, hard-to-reach mountains on dangerous search and rescue missions, and a hi-tech ice machine works tirelessly at a Toronto airport to keep flights running in brutal conditions.

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

A 4,000-year-old leather manuscript at the Cairo Museum sheds new light on The Book of the Dead from ancient Egypt.

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.

Looking at the engineering genius that's taken repurposing underground, from a rotting shipyard transformed into a subterranean museum to a rusting bank vault that serves cocktails.

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

Builders work to make the Draken stronger and sturdier after its failed first voyage; eager volunteers rush to finish before it's too late to set sail; the vital but forgotten role played by Viking women.

The view from above reveals baffling behavior from one of the ocean's fastest fish; whales with a strange, aquatic accessorizing habit; a confounding congregation of sharks down under; a perplexing collection of circles decorating the seabed.

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.

Builders work to make the Draken stronger and sturdier after its failed first voyage; eager volunteers rush to finish before it's too late to set sail; the vital but forgotten role played by Viking women.

The view from above reveals baffling behavior from one of the ocean's fastest fish; whales with a strange, aquatic accessorizing habit; a confounding congregation of sharks down under; a perplexing collection of circles decorating the seabed.

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 trip goes wrong when a pilot's Piper Super Cub crashes into a treacherous waterway.

Builders work to make the Draken stronger and sturdier after its failed first voyage; eager volunteers rush to finish before it's too late to set sail; the vital but forgotten role played by Viking women.

The view from above reveals baffling behavior from one of the ocean's fastest fish; whales with a strange, aquatic accessorizing habit; a confounding congregation of sharks down under; a perplexing collection of circles decorating the seabed.

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.

Military search and rescue efforts in deadly arctic conditions rely on a specialized helicopter with unrivaled power and endurance, and special access reveals how it works; in the Alps, a monster snow blower keeps trains running in dangerous weather.

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

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.

Military search and rescue efforts in deadly arctic conditions rely on a specialized helicopter with unrivaled power and endurance, and special access reveals how it works; in the Alps, a monster snow blower keeps trains running in dangerous weather.

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

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.

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

Evidence of ritual murder, human sacrifice and cannibalism in the desert valley of Chaco Canyon, New Mexico.

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

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

Evidence of ritual murder, human sacrifice and cannibalism in the desert valley of Chaco Canyon, New Mexico.

Investigate the costs of Hitler's Soviet invasion, which aims to give the Nazis control over a key nickel mine and a transportation hub; seeing how this summer battle turns into a bitter winter war as the Allies tighten their grip on the Arctic.

The view from above reveals baffling behavior from one of the ocean's fastest fish; whales with a strange, aquatic accessorizing habit; a confounding congregation of sharks down under; a perplexing collection of circles decorating the seabed.

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.

At midnight on July 30, 1945, the USS Indianapolis was sailing west on the Pacific toward the Philippines with 1,197 men on board when it was hit with two Japanese torpedoes.

The overlooked underdog of British fighter planes; fast and versatile, the dogfighter doubled as a bomber and ground support aircraft in every theatre of WWII.

When his company attempts to capture a small village, an American soldier, born in Mexico but raised in Texas, must crawl through an enemy minefield to capture two German machine gun nests holding up his unit.

At midnight on July 30, 1945, the USS Indianapolis was sailing west on the Pacific toward the Philippines with 1,197 men on board when it was hit with two Japanese torpedoes.

The overlooked underdog of British fighter planes; fast and versatile, the dogfighter doubled as a bomber and ground support aircraft in every theatre of WWII.

When his company attempts to capture a small village, an American soldier, born in Mexico but raised in Texas, must crawl through an enemy minefield to capture two German machine gun nests holding up his unit.

Evidence is lost to a fire after a Cessna crash on a public road, challenging investigators.

At midnight on July 30, 1945, the USS Indianapolis was sailing west on the Pacific toward the Philippines with 1,197 men on board when it was hit with two Japanese torpedoes.

The overlooked underdog of British fighter planes; fast and versatile, the dogfighter doubled as a bomber and ground support aircraft in every theatre of WWII.

When his company attempts to capture a small village, an American soldier, born in Mexico but raised in Texas, must crawl through an enemy minefield to capture two German machine gun nests holding up his unit.

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 Magdalen Islands.

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.

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 Magdalen Islands.

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 Naval warfare's fastest combat ships and how the advantage of speed determined the outcome of some of the great seas battles of the last 150 years.

A look at riverine warfare from the Civil War to Vietnam and small but powerful combat ships.

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 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.

Investigate the costs of Hitler's Soviet invasion, which aims to give the Nazis control over a key nickel mine and a transportation hub; seeing how this summer battle turns into a bitter winter war as the Allies tighten their grip on the Arctic.

At midnight on July 30, 1945, the USS Indianapolis was sailing west on the Pacific toward the Philippines with 1,197 men on board when it was hit with two Japanese torpedoes.

The overlooked underdog of British fighter planes; fast and versatile, the dogfighter doubled as a bomber and ground support aircraft in every theatre of WWII.

An American 2nd lieutenant sends his company back during an enemy counterattack during the Allied bid to clear the Colmar Pocket; he tries to hold off the German soldiers with his carbine rifle and calling in artillery but runs out of bullets.

Military experts and historians crisscross Europe to revisit the war's most iconic sites to uncover untold stories and long-forgotten secrets.

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 look at how technological advances over the centuries have transformed maritime warfare.

Military experts and historians crisscross Europe to revisit the war's most iconic sites to uncover untold stories and long-forgotten secrets.

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 look at how technological advances over the centuries have transformed maritime warfare.

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.

Military experts and historians crisscross Europe to revisit the war's most iconic sites to uncover untold stories and long-forgotten secrets.

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 look at how technological advances over the centuries have transformed maritime warfare.

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.

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

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.

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.

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

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.

In Jordan and Saudi Arabia, two cities, Petra and Hegra, are thought to have been centers of a "lost matriarchy.".

After the king of France targets the Knights Templar, they face imprisonment, torture and executions, but their legacy endures through present day.

Archaeologists discover a link between the prophecies of the oracles and seismic activity beneath Earth's surface.

A 4,000-year-old leather manuscript at the Cairo Museum sheds new light on The Book of the Dead from ancient Egypt.

Evidence of ritual murder, human sacrifice and cannibalism in the desert valley of Chaco Canyon, New Mexico.

Military experts and historians crisscross Europe to revisit the war's most iconic sites to uncover untold stories and long-forgotten secrets.

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 look at how technological advances over the centuries have transformed maritime warfare.

Valentine's day delays loom when a squadron of F22 makes an unexpected landing; high winds threaten a helicopter's 600lb sling load; Aviators come to the rescue of a village without water.

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.

A 284ft wooden skyscraper built from 1,200 bespoke pieces tests fire safety limits in Milwaukee. A decaying Amsterdam crane track transforms into elegant glass offices.

Valentine's day delays loom when a squadron of F22 makes an unexpected landing; high winds threaten a helicopter's 600lb sling load; Aviators come to the rescue of a village without water.

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.

A 284ft wooden skyscraper built from 1,200 bespoke pieces tests fire safety limits in Milwaukee. A decaying Amsterdam crane track transforms into elegant glass offices.

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.

Valentine's day delays loom when a squadron of F22 makes an unexpected landing; high winds threaten a helicopter's 600lb sling load; Aviators come to the rescue of a village without water.

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.

A 284ft wooden skyscraper built from 1,200 bespoke pieces tests fire safety limits in Milwaukee. A decaying Amsterdam crane track transforms into elegant glass offices.

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.

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

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.

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 Dawn mission explores the asteroid Vesta and dwarf planet Ceres.

Paid programming.

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

Many experts believe King Arthur was a mythical figure; however, new evidence from ancient sites suggests that the Arthurian legend is rooted in fact, and it may finally answer the question of whether this storied king was real or myth.

Crawling down the Red River, the Amphibex protects those who live along it during the thaw, while the Hercules C-130 J takes to the Arctic skies of the Canadian North; preparing for summer exploratory missions is Swedish built icebreaker Oden.

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

Many experts believe King Arthur was a mythical figure; however, new evidence from ancient sites suggests that the Arthurian legend is rooted in fact, and it may finally answer the question of whether this storied king was real or myth.

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