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

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

Tease out the common denominators that lead to tyranny; map the rise of some of the 20th century's dictators and discover how they seized power, exploited governing systems and gutted existing power structures to gain total control.

The story of the construction of ancient Egypt's first pyramid, built 4,700 years ago to help the Pharaoh Djoser achieve immortality.

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

Tease out the common denominators that lead to tyranny; map the rise of some of the 20th century's dictators and discover how they seized power, exploited governing systems and gutted existing power structures to gain total control.

The story of the construction of ancient Egypt's first pyramid, built 4,700 years ago to help the Pharaoh Djoser achieve immortality.

Bill Nighy narrates a trip along the River Po, traveling across northern Italy from the snow-capped Alps to the delta where it meets the Adriatic Sea.

At Monster Jam, custom-built monster trucks roll, flip, and fly through the air. With the metal-bending beating these trucks endure, teams of specialized mechanics race against the clock to repair these engineering marvels in time for the next event.

Mike is in Iceland, where teams harness the power of volcanos to keep the geothermal energy flowing; they battle harsh weather to maintain and upgrade giant power systems, fixing miles of steam pipes, and bringing a dead well back to life.

Studies are currently under way looking for evidence of dark energy in the movement of galaxies.

Paid programming.

In Florida, Mike tackles one of the dangerous jobs on the planet, commercial diving; he helps a specialized team keep waterways safe; fixing construction site leaks and removing dangerous structures, all while hurricane season is in full swing.

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 accessible.

Mike in northeastern Australia, goes on and under the water, into labs and onto construction projects working with specialized teams; they tackle the challenge of saving dying coral on the Great Barrier Reef.

Mike joins crews as they build the world's longest railway tunnel in the Alps, fixing gridlock through the infamous Brenner Pass by drilling, blasting and digging their way through the mountains.

Mike works with repair and construction teams at Dreamworld, Australia's largest theme park, after a cyclone caused $4M in damage; they fix scream machines and finish a $50M expansion featuring the world's first triple switch rollercoaster.

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.

Tease out the common denominators that lead to tyranny; map the rise of some of the 20th century's dictators and discover how they seized power, exploited governing systems and gutted existing power structures to gain total control.

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

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

Tease out the common denominators that lead to tyranny; map the rise of some of the 20th century's dictators and discover how they seized power, exploited governing systems and gutted existing power structures to gain total control.

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

The Black Pyramid is a decaying brick-and-clay structure that contains an elaborate network of tunnels filled with ancient artifacts; Egyptologists use a mini-laser to uncover the mysteries contained within.

Chart the turbulent reign of a brilliant strategist who allied herself with powerful Roman leaders in the hopes of saving her kingdom; examine the battle against Octavian that ended three millennia of Egyptian history and sealed Cleopatra's fate.

The Pyramid of Khufu is the only one of the Seven Wonders of the Ancient World which can still be seen in its original state.

The Black Pyramid is a decaying brick-and-clay structure that contains an elaborate network of tunnels filled with ancient artifacts; Egyptologists use a mini-laser to uncover the mysteries contained within.

Chart the turbulent reign of a brilliant strategist who allied herself with powerful Roman leaders in the hopes of saving her kingdom; examine the battle against Octavian that ended three millennia of Egyptian history and sealed Cleopatra's fate.

The Pyramid of Khufu is the only one of the Seven Wonders of the Ancient World which can still be seen in its original state.

The Black Pyramid is a decaying brick-and-clay structure that contains an elaborate network of tunnels filled with ancient artifacts; Egyptologists use a mini-laser to uncover the mysteries contained within.

Chart the turbulent reign of a brilliant strategist who allied herself with powerful Roman leaders in the hopes of saving her kingdom; examine the battle against Octavian that ended three millennia of Egyptian history and sealed Cleopatra's fate.

The Pyramid of Khufu is the only one of the Seven Wonders of the Ancient World which can still be seen in its original state.

Bill Nighy leads a magical journey in the Norfolk Broads along England's holiday river, the River Bure; discovering a watery world where both wildlife and recreation go hand in hand.

Flying on one of the biggest helicopters on Earth, on a quest to pull valuable timber from the forest; huge repairs threaten to bring this mission to a halt.

Going on a journey across Lithuania on big trains packed to the brim as massive ships wait to collect their bounty and take it across the ocean.

Lunar and solar eclipses.

Paid programming.

A mission to haul hefty cargo across Switzerland to the Netherlands, going through four countries with critical repairs at every turn.

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

Venturing into the deep waters of the Caribbean Sea for high stakes repairs on one of the one of the world's largest open ocean fish farm operations.

Going under one of the world's largest lakes for a multi-million dollar tunnel boring project in one of the fastest growing cities on Earth.

Flying on one of the biggest helicopters on Earth, on a quest to pull valuable timber from the forest; huge repairs threaten to bring this mission to a halt.

Going on a journey across Lithuania on big trains packed to the brim as massive ships wait to collect their bounty and take it across the ocean.

A mission to haul hefty cargo across Switzerland to the Netherlands, going through four countries with critical repairs at every turn.

The Black Pyramid is a decaying brick-and-clay structure that contains an elaborate network of tunnels filled with ancient artifacts; Egyptologists use a mini-laser to uncover the mysteries contained within.

Chart the turbulent reign of a brilliant strategist who allied herself with powerful Roman leaders in the hopes of saving her kingdom; examine the battle against Octavian that ended three millennia of Egyptian history and sealed Cleopatra's fate.

The Pyramid of Khufu is the only one of the Seven Wonders of the Ancient World which can still be seen in its original state.

Examine a unique silver scroll found in a collapsed Umayyad-period house in Jerash, Jordan; watch an advanced CT scanner penetrate its lead casing, revealing mysterious grooves and an enigmatic message that suggests it may be a protective amulet.

Explore three discoveries that change what we know about magic and superstition; delve into a Polish vampire grave, open a UK witch bottle used to ward off evil, and see if alien-like skulls in Mexico were shaped by humans or otherworldly beings.

Look into the strange disappearance of the Lost Colony of Roanoke in 1590, then discover how the Hope Diamond was stolen during the French Revolution; pinpoint new clues that could explain why the USS Cyclops vanished in 1918 in the Bermuda Triangle.

Examine a unique silver scroll found in a collapsed Umayyad-period house in Jerash, Jordan; watch an advanced CT scanner penetrate its lead casing, revealing mysterious grooves and an enigmatic message that suggests it may be a protective amulet.

Explore three discoveries that change what we know about magic and superstition; delve into a Polish vampire grave, open a UK witch bottle used to ward off evil, and see if alien-like skulls in Mexico were shaped by humans or otherworldly beings.

Look into the strange disappearance of the Lost Colony of Roanoke in 1590, then discover how the Hope Diamond was stolen during the French Revolution; pinpoint new clues that could explain why the USS Cyclops vanished in 1918 in the Bermuda Triangle.

Examine a unique silver scroll found in a collapsed Umayyad-period house in Jerash, Jordan; watch an advanced CT scanner penetrate its lead casing, revealing mysterious grooves and an enigmatic message that suggests it may be a protective amulet.

Explore three discoveries that change what we know about magic and superstition; delve into a Polish vampire grave, open a UK witch bottle used to ward off evil, and see if alien-like skulls in Mexico were shaped by humans or otherworldly beings.

Look into the strange disappearance of the Lost Colony of Roanoke in 1590, then discover how the Hope Diamond was stolen during the French Revolution; pinpoint new clues that could explain why the USS Cyclops vanished in 1918 in the Bermuda Triangle.

Examine a unique silver scroll found in a collapsed Umayyad-period house in Jerash, Jordan; watch an advanced CT scanner penetrate its lead casing, revealing mysterious grooves and an enigmatic message that suggests it may be a protective amulet.

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

Look into the strange disappearance of the Lost Colony of Roanoke in 1590, then discover how the Hope Diamond was stolen during the French Revolution; pinpoint new clues that could explain why the USS Cyclops vanished in 1918 in the Bermuda Triangle.

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

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

Uncover how a royal imprisoned two princes and took the British throne. Ponder how the Irish crown jewels were stolen from a locked safe inside Dublin Castle, then see if the death of Amy Robsart at Elizabeth I's court was an accident or murder.

Hunt for the Amber Room, a Nazi-looted treasure that disappeared in 1944. Track the final flight of bandleader Glenn Miller over the English Channel, then re-examine the arrest of Anne Frank to see if she was betrayed or a victim of coincidence.

Question whether Napoleon Bonaparte was poisoned in exile, then find out whose bones were buried underneath Benjamin Franklin's London home; analyze evidence that suggests that Grand Duchess Anastasia may have escaped the 1918 Romanov massacre.

Joining the manhunt for three inmates who escaped Alcatraz in 1962; following the trail of pirate Henry Avery after he pulled off a massive heist in 1695, then stalking Axeman of New Orleans, a serial killer who taunted police but spared jazz lovers.

Revisit the crimes of Jack the Ripper as investigators try to ID his first victim. Chase the Mad Gasser, who terrorized an Illinois town in 1944, then hunt for the Servant Girl Annihilator, a killer who stalked Austin, Texas, in the darkness.

Determining if exotic dancer Mata Hari was a spy or just a wartime scapegoat; solving the riddle of Kaspar Hauser, the boy who appeared from nowhere; trying to identify the Man in the Iron Mask, who died in a French prison without revealing his face.

Diving into the mystery of the HMS Terror, an Arctic ship found 150 years after it and its crew vanished without a trace; seeing if the explosion of the SS Sultana on the Mississippi was an accident or sabotage; boarding the ghost ship Mary Celeste.

Examine a unique silver scroll found in a collapsed Umayyad-period house in Jerash, Jordan; watch an advanced CT scanner penetrate its lead casing, revealing mysterious grooves and an enigmatic message that suggests it may be a protective amulet.

Explore three discoveries that change what we know about magic and superstition; delve into a Polish vampire grave, open a UK witch bottle used to ward off evil, and see if alien-like skulls in Mexico were shaped by humans or otherworldly beings.

Look into the strange disappearance of the Lost Colony of Roanoke in 1590, then discover how the Hope Diamond was stolen during the French Revolution; pinpoint new clues that could explain why the USS Cyclops vanished in 1918 in the Bermuda Triangle.

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.

The brief but historic service of the Grumman F6F Hellcat and its instrumental role in winning the Pacific War.

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

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.

The brief but historic service of the Grumman F6F Hellcat and its instrumental role in winning the Pacific War.

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

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.

The brief but historic service of the Grumman F6F Hellcat and its instrumental role in winning the Pacific War.

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

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.

An exploration of the astrophysics of stars creating matter.

An exploration of the science behind the Anthropic Principle.

A breathtaking journey down the German section of the beautiful Moselle river, famous for vineyards on its dramatically steep banks and remarkable meandering loops.

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.

An exploration of the astrophysics of stars creating matter.

An exploration of the science behind the Anthropic Principle.

Capt. John Ward and his crew are called to raise a sunken houseboat near Pensacola, Fla.; the owner of the boat wants it back, but the current occupiers of the boat living in it don't want John's services; there've been reports of gunfire too.

An exploration of the astrophysics of stars creating matter.

Paid programming.

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

Discover why the desire to capture Nazi weapon technology turns the U.S. and USSR from WW II allies into Cold War enemies; look at how the superpowers try to gain an Arctic foothold, from guerrilla warfare to intelligence schemes to nuclear arms.

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

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.

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.

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

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.

Revisit Colditz Castle, a Nazi fortress where breakouts featured human catapults and clever disguises; meet the pilots who staged the famed Great Escape from a Polish stalag; see how 32 POWs pulled off the Warburg Wire Job in just one minute.

In July 1944, French resistance fighters called Maquisards declared a Free French Republic on the remote Vercors plateau in eastern France to support the Allied invasion of Normandy.

When a body is discovered in a bombed-out London church, investigators race to determine if it was caused by the Nazi Blitz or a local killer.

Revisit Colditz Castle, a Nazi fortress where breakouts featured human catapults and clever disguises; meet the pilots who staged the famed Great Escape from a Polish stalag; see how 32 POWs pulled off the Warburg Wire Job in just one minute.

In July 1944, French resistance fighters called Maquisards declared a Free French Republic on the remote Vercors plateau in eastern France to support the Allied invasion of Normandy.

When a body is discovered in a bombed-out London church, investigators race to determine if it was caused by the Nazi Blitz or a local killer.

In July 1944, French resistance fighters called Maquisards declared a Free French Republic on the remote Vercors plateau in eastern France to support the Allied invasion of Normandy.

The story of the construction of ancient Egypt's first pyramid, built 4,700 years ago to help the Pharaoh Djoser achieve immortality.

When a body is discovered in a bombed-out London church, investigators race to determine if it was caused by the Nazi Blitz or a local killer.

In July 1944, French resistance fighters called Maquisards declared a Free French Republic on the remote Vercors plateau in eastern France to support the Allied invasion of Normandy.

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.

New York's Hudson River stretches 315 miles through natural landscapes, from the Adirondack Mountains to the George Washington Bridge and Statue of Liberty.

Traipsing along ancient pathways criss-crossing Easter Island; finding gigantic designs carved into Asia's Eastern Steppe; ascending a tall pyramid rising from Antarctica's icy landscape.

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.

John Ward and his crew are called to salvage a massive barge upturned by a storm in a canal; Hickory Scuba Divers work to salvage a valuable sailboat that's sunk at its mooring.

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

Paid programming.

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

Examine a unique silver scroll found in a collapsed Umayyad-period house in Jerash, Jordan; watch an advanced CT scanner penetrate its lead casing, revealing mysterious grooves and an enigmatic message that suggests it may be a protective amulet.

Explore three discoveries that change what we know about magic and superstition; delve into a Polish vampire grave, open a UK witch bottle used to ward off evil, and see if alien-like skulls in Mexico were shaped by humans or otherworldly beings.

Look into the strange disappearance of the Lost Colony of Roanoke in 1590, then discover how the Hope Diamond was stolen during the French Revolution; pinpoint new clues that could explain why the USS Cyclops vanished in 1918 in the Bermuda Triangle.

The Black Pyramid is a decaying brick-and-clay structure that contains an elaborate network of tunnels filled with ancient artifacts; Egyptologists use a mini-laser to uncover the mysteries contained within.

Chart the turbulent reign of a brilliant strategist who allied herself with powerful Roman leaders in the hopes of saving her kingdom; examine the battle against Octavian that ended three millennia of Egyptian history and sealed Cleopatra's fate.

The Pyramid of Khufu is the only one of the Seven Wonders of the Ancient World which can still be seen in its original state.

Yellowstone Park in the United States is the scene of an inexplicable phenomenon: the disappearance of the moose; between wolves, cougars and grizzly bears, the list of suspects is long and scientists conduct a survey to save the moose.

A 284ft wooden skyscraper built from 1,200 bespoke pieces tests fire safety limits in Milwaukee; a decaying Amsterdam crane track transforms into glass offices; a needle-thin tower stacks 28 apartments onto a 21ft-wide plot in Melbourne, Australia.

Mike works with the U.S. Army in Germany inside the massive fix facility The MAK, Maintenance Activity Kaiserslautern, as teams repair over one hundred Bradley fighting vehicles, then embeds with troops in a massive two week long battle exercise.

Flying on one of the biggest helicopters on Earth, on a quest to pull valuable timber from the forest; huge repairs threaten to bring this mission to a halt.

A 284ft wooden skyscraper built from 1,200 bespoke pieces tests fire safety limits in Milwaukee; a decaying Amsterdam crane track transforms into glass offices; a needle-thin tower stacks 28 apartments onto a 21ft-wide plot in Melbourne, Australia.

Mike works with the U.S. Army in Germany inside the massive fix facility The MAK, Maintenance Activity Kaiserslautern, as teams repair over one hundred Bradley fighting vehicles, then embeds with troops in a massive two week long battle exercise.

Flying on one of the biggest helicopters on Earth, on a quest to pull valuable timber from the forest; huge repairs threaten to bring this mission to a halt.

A 284ft wooden skyscraper built from 1,200 bespoke pieces tests fire safety limits in Milwaukee; a decaying Amsterdam crane track transforms into glass offices; a needle-thin tower stacks 28 apartments onto a 21ft-wide plot in Melbourne, Australia.

Mike works with the U.S. Army in Germany inside the massive fix facility The MAK, Maintenance Activity Kaiserslautern, as teams repair over one hundred Bradley fighting vehicles, then embeds with troops in a massive two week long battle exercise.

Flying on one of the biggest helicopters on Earth, on a quest to pull valuable timber from the forest; huge repairs threaten to bring this mission to a halt.

A 284ft wooden skyscraper built from 1,200 bespoke pieces tests fire safety limits in Milwaukee; a decaying Amsterdam crane track transforms into glass offices; a needle-thin tower stacks 28 apartments onto a 21ft-wide plot in Melbourne, Australia.

Follow the meteoric rise of the Macedonian conqueror who seized Egypt and built an empire that stretched from Europe to Asia; find out how founding the city of Alexandria and becoming a pharaoh transformed Alexander's life before his death at age 32.

Uncover the secrets of the Old Kingdom ruler who revolutionized architecture alongside his vizier, Imhotep; piece together the mysterious life of the very first king to build a step pyramid in the heart of a grandiose and complex burial site.

Ramesses II reigns for 66 years and builds monuments and temples.

Delve into the history of the Fourth Dynasty monarch responsible for one of the great pyramids; examine the tyrannical reputation of this ancient leader and decipher the complex strategies he used to guide such a massive building project.

Chart the turbulent reign of a brilliant strategist who allied herself with powerful Roman leaders in the hopes of saving her kingdom; examine the battle against Octavian that ended three millennia of Egyptian history and sealed Cleopatra's fate.

Unearth the dramatic final days of the Twentieth Dynasty's great warrior king, Ramses III; view a rare judicial papyrus that recounts the story of an assassination plot hatched in the royal harem; see what the monarch's mummy reveals today.

Follow the meteoric rise of the Macedonian conqueror who seized Egypt and built an empire that stretched from Europe to Asia; find out how founding the city of Alexandria and becoming a pharaoh transformed Alexander's life before his death at age 32.

Uncover the secrets of the Old Kingdom ruler who revolutionized architecture alongside his vizier, Imhotep; piece together the mysterious life of the very first king to build a step pyramid in the heart of a grandiose and complex burial site.

Ramesses II reigns for 66 years and builds monuments and temples.

Delve into the history of the Fourth Dynasty monarch responsible for one of the great pyramids; examine the tyrannical reputation of this ancient leader and decipher the complex strategies he used to guide such a massive building project.

Chart the turbulent reign of a brilliant strategist who allied herself with powerful Roman leaders in the hopes of saving her kingdom; examine the battle against Octavian that ended three millennia of Egyptian history and sealed Cleopatra's fate.

Unearth the dramatic final days of the Twentieth Dynasty's great warrior king, Ramses III; view a rare judicial papyrus that recounts the story of an assassination plot hatched in the royal harem; see what the monarch's mummy reveals today.

Mike works with the U.S. Army in Germany inside the massive fix facility The MAK, Maintenance Activity Kaiserslautern, as teams repair over one hundred Bradley fighting vehicles, then embeds with troops in a massive two week long battle exercise.

A 284ft wooden skyscraper built from 1,200 bespoke pieces tests fire safety limits in Milwaukee; a decaying Amsterdam crane track transforms into glass offices; a needle-thin tower stacks 28 apartments onto a 21ft-wide plot in Melbourne, Australia.

A rookie pilot flies passengers for the first time, airport staff battle to prevent bird strikes, a helicopter carries a heavy load over Johannesburg, and Africa's most skilled helicopter pilots fly low to protect rhinos from poachers.

The Coast Guard flies a twelve-ton fuel truck to keep a remote base operational. An athlete flies to a dangerous airport for a glacier race. Fairbanks crews fight an avian invasion, and after a decade in a museum, a Grumman Goo.

For centuries, Mexico's historic center has been a land of legends and power. From Veracruz's shores to Mexico City's ancient layers, Puebla's epic battle and Michoacán's indigenous traditions, discover where empires rise and triumph.

A rookie pilot flies passengers for the first time, airport staff battle to prevent bird strikes, a helicopter carries a heavy load over Johannesburg, and Africa's most skilled helicopter pilots fly low to protect rhinos from poachers.

The Coast Guard flies a twelve-ton fuel truck to keep a remote base operational. An athlete flies to a dangerous airport for a glacier race. Fairbanks crews fight an avian invasion, and after a decade in a museum, a Grumman Goo.

For centuries, Mexico's historic center has been a land of legends and power. From Veracruz's shores to Mexico City's ancient layers, Puebla's epic battle and Michoacán's indigenous traditions, discover where empires rise and triumph.

A rookie pilot flies passengers for the first time, airport staff battle to prevent bird strikes, a helicopter carries a heavy load over Johannesburg, and Africa's most skilled helicopter pilots fly low to protect rhinos from poachers.

The Coast Guard flies a twelve-ton fuel truck to keep a remote base operational. An athlete flies to a dangerous airport for a glacier race. Fairbanks crews fight an avian invasion, and after a decade in a museum, a Grumman Goo.

For centuries, Mexico's historic center has been a land of legends and power. From Veracruz's shores to Mexico City's ancient layers, Puebla's epic battle and Michoacán's indigenous traditions, discover where empires rise and triumph.

A rookie pilot flies passengers for the first time, airport staff battle to prevent bird strikes, a helicopter carries a heavy load over Johannesburg, and Africa's most skilled helicopter pilots fly low to protect rhinos from poachers.

Investigate one of Egypt's oldest monuments to eternity: the Buried Pyramid of Sekhemkhet; explore a well-preserved underground tomb and view a mysterious sarcophagus during the first-ever on-camera exploration of this 4,500-year-old sacred place.

Visiting the heart of history in the Dahshur 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.

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.

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

Examining the science behind the birth of the universe.

Paid programming.

Exceptional texts are inscribed on the walls of an obscure pyramid; experts scan the funerary chamber of Egypt's longest-reigning pharaoh to try to uncover its mysteries.

The Black Pyramid is a decaying brick-and-clay structure that contains an elaborate network of tunnels filled with ancient artifacts; Egyptologists use a mini-laser to uncover the mysteries contained within.

Investigate one of Egypt's oldest monuments to eternity: the Buried Pyramid of Sekhemkhet; explore a well-preserved underground tomb and view a mysterious sarcophagus during the first-ever on-camera exploration of this 4,500-year-old sacred place.

Visiting the heart of history in the Dahshur 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.

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.

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

Exceptional texts are inscribed on the walls of an obscure pyramid; experts scan the funerary chamber of Egypt's longest-reigning pharaoh to try to uncover its mysteries.

The Black Pyramid is a decaying brick-and-clay structure that contains an elaborate network of tunnels filled with ancient artifacts; Egyptologists use a mini-laser to uncover the mysteries contained within.

For centuries, Mexico's historic center has been a land of legends and power. From Veracruz's shores to Mexico City's ancient layers, Puebla's epic battle and Michoacán's indigenous traditions, discover where empires rise and triumph.

On July 3, 1940, the British fleet attacks the French navy at Mers el-Kébir, Algeria; in ten minutes, Bretagne sank, Mogador was destroyed, and Provence and Dunkerque were grounded.

A look at how maritime task forces and the Coast Guard are keeping commercial vessels and US shores safe from pirates and drug smugglers.

Uncover the sinister ways that dictators convince their followers to worship them as heroes; watch how they weave mythical narratives around their abilities, selling themselves as saviors who should hold absolute power over the people.

On July 3, 1940, the British fleet attacks the French navy at Mers el-Kébir, Algeria; in ten minutes, Bretagne sank, Mogador was destroyed, and Provence and Dunkerque were grounded.

A look at how maritime task forces and the Coast Guard are keeping commercial vessels and US shores safe from pirates and drug smugglers.

Uncover the sinister ways that dictators convince their followers to worship them as heroes; watch how they weave mythical narratives around their abilities, selling themselves as saviors who should hold absolute power over the people.

Exploring how Pharaoh Snefru shifted the pyramid age into high gear by ordering three massive monuments.

A look at how maritime task forces and the Coast Guard are keeping commercial vessels and US shores safe from pirates and drug smugglers.

Uncover the sinister ways that dictators convince their followers to worship them as heroes; watch how they weave mythical narratives around their abilities, selling themselves as saviors who should hold absolute power over the people.

Exploring how Pharaoh Snefru shifted the pyramid age into high gear by ordering three massive monuments.

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

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

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

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

Paid programming.

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

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

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

On July 3, 1940, the British fleet attacks the French navy at Mers el-Kébir, Algeria; in ten minutes, Bretagne sank, Mogador was destroyed, and Provence and Dunkerque were grounded.

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

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

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

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

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

Uncover the sinister ways that dictators convince their followers to worship them as heroes; watch how they weave mythical narratives around their abilities, selling themselves as saviors who should hold absolute power over the people.

Building an eco-friendly visitor center in the permafrost on Colorado's Pikes Peak tests the team. A museum is constructed in a disused dry dock that's in danger of collapse.

Investigate one of Egypt's oldest monuments to eternity: the Buried Pyramid of Sekhemkhet; explore a well-preserved underground tomb and view a mysterious sarcophagus during the first-ever on-camera exploration of this 4,500-year-old sacred place.

Unearth the dramatic final days of the Twentieth Dynasty's great warrior king, Ramses III; view a rare judicial papyrus that recounts the story of an assassination plot hatched in the royal harem; see what the monarch's mummy reveals today.

At the heart of Saqqara, the largest necropolis in Egypt is the Step Pyramid of Djoser, built around 2600 BC.

Investigate one of Egypt's oldest monuments to eternity: the Buried Pyramid of Sekhemkhet; explore a well-preserved underground tomb and view a mysterious sarcophagus during the first-ever on-camera exploration of this 4,500-year-old sacred place.

Unearth the dramatic final days of the Twentieth Dynasty's great warrior king, Ramses III; view a rare judicial papyrus that recounts the story of an assassination plot hatched in the royal harem; see what the monarch's mummy reveals today.

At the heart of Saqqara, the largest necropolis in Egypt is the Step Pyramid of Djoser, built around 2600 BC.

Investigate one of Egypt's oldest monuments to eternity: the Buried Pyramid of Sekhemkhet; explore a well-preserved underground tomb and view a mysterious sarcophagus during the first-ever on-camera exploration of this 4,500-year-old sacred place.

Unearth the dramatic final days of the Twentieth Dynasty's great warrior king, Ramses III; view a rare judicial papyrus that recounts the story of an assassination plot hatched in the royal harem; see what the monarch's mummy reveals today.

At the heart of Saqqara, the largest necropolis in Egypt is the Step Pyramid of Djoser, built around 2600 BC.

Tease out the common denominators that lead to tyranny; map the rise of some of the 20th century's dictators and discover how they seized power, exploited governing systems and gutted existing power structures to gain total control.

Uncover the sinister ways that dictators convince their followers to worship them as heroes; watch how they weave mythical narratives around their abilities, selling themselves as saviors who should hold absolute power over the people.

Dictators may appear omnipotent, but their position depends largely on a network of individuals who benefit from their rule, and their support does not come cheap.

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

Paid programming.

Dictators are characterized as charismatic, narcissistic and sadistic, but most of all by their thirst for power; once in power, holding on to it requires negotiation, coercion and force.

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

Consider the factors that inevitably cause dictatorships to crumble; look at how hubris destroys cults of personality; see how factions fracture military dictatorships; weigh the miscalculations that turn the tide against tyranny.

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

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

Dictators are characterized as charismatic, narcissistic and sadistic, but most of all by their thirst for power; once in power, holding on to it requires negotiation, coercion and force.

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

Consider the factors that inevitably cause dictatorships to crumble; look at how hubris destroys cults of personality; see how factions fracture military dictatorships; weigh the miscalculations that turn the tide against tyranny.

Tease out the common denominators that lead to tyranny; map the rise of some of the 20th century's dictators and discover how they seized power, exploited governing systems and gutted existing power structures to gain total control.

At the heart of Saqqara, the largest necropolis in Egypt is the Step Pyramid of Djoser, built around 2600 BC.

Deploy futuristic lidar technology to map the Amber Road, an ancient trade network linking the Baltic Sea to the Mediterranean. Follow researchers as they retrace the route and reshape our understanding of historical trade and cultural exchange.

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

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

Deploy futuristic lidar technology to map the Amber Road, an ancient trade network linking the Baltic Sea to the Mediterranean. Follow researchers as they retrace the route and reshape our understanding of historical trade and cultural exchange.

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

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

Deploy futuristic lidar technology to map the Amber Road, an ancient trade network linking the Baltic Sea to the Mediterranean. Follow researchers as they retrace the route and reshape our understanding of historical trade and cultural exchange.

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

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

Deploy futuristic lidar technology to map the Amber Road, an ancient trade network linking the Baltic Sea to the Mediterranean. Follow researchers as they retrace the route and reshape our understanding of historical trade and cultural exchange.

Explore three discoveries that change what we know about magic and superstition; delve into a Polish vampire grave, open a UK witch bottle used to ward off evil, and see if alien-like skulls in Mexico were shaped by humans or otherworldly beings.

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

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

Discover shocking truths about religious rituals, sacred symbols, and spiritual traditions. Learn the brutal truth about execution rites in Roman England, look at shark bones in a Peruvian temple, and unearth a secret silver amulet in Germany.

Rethink what we know about death and preservation. See why Denmark's perfectly preserved Tollund Man raises haunting questions, observe Portuguese bodies that rewrite history, and uncover the dark mystery of Scotland's Frankenstein mummies.

Open burial sites filled with secrets. Find powerful artifacts in a French rulers tomb, see what a tomb adorned with conch shells says about sacred ceremonies, and expose complex beliefs about animals and the afterlife in an Egyptian zoo graveyard.

Puzzling over history-making structures and artifacts; Searching for clues about civilization's origins in Göbekli Tepe, visiting a German statue that reveals symbolic thought; witnessing the brutality of colonization in a Mexican skull tower.

Learning how displaced artifacts spark fresh investigations and rewrite timelines; unearthing a forgotten tragedy in a remote mountain lake in India, checking out footprints that change human migration stories; reopening an ancient cold case.

Re-evaluating what we know about evolution, extinction, and animals' sacred roles. Dig up a Canadian dinosaur that sparks questions about fossilization, meet a prehistoric survivor in China, and see the religious parts crocodiles played in Egypt.

Shedding light on the origins of organized warfare and the brutality it left behind; hunting for the beginnings of organized combat in Germany; finding evidence of Roman power in Denmark, and pondering the symbolic role of elite fighters.

Explore three discoveries that change what we know about magic and superstition; delve into a Polish vampire grave, open a UK witch bottle used to ward off evil, and see if alien-like skulls in Mexico were shaped by humans or otherworldly beings.

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

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

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