The American Museum of Natural History in NYC gets a cave-like extension; an arts center inspired by migrating birds is built on a lake in China; Boston University gains a fossil-free, Jenga-like tower.

Mike helps fix the machines that keep one of the United States' biggest ports moving; he assists a team in moving a 3-million pound crane.

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

The American Museum of Natural History in NYC gets a cave-like extension; an arts center inspired by migrating birds is built on a lake in China; Boston University gains a fossil-free, Jenga-like tower.

Mike helps fix the machines that keep one of the United States' biggest ports moving; he assists a team in moving a 3-million pound crane.

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

The American Museum of Natural History in NYC gets a cave-like extension; an arts center inspired by migrating birds is built on a lake in China; Boston University gains a fossil-free, Jenga-like tower.

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.

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

Chris Ward sets out with Josh Moreira and Ward's younger brother to salvage a light aircraft that's sitting on the seabed; Jeremy Birch braves the arctic conditions to salvage two vessels that have fallen prey to the crushing ice conditions.

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.

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

Isaac Brock's daring made him a hero, but may also be his flaw.

Chris Ward sets out with Josh Moreira and Ward's younger brother to salvage a light aircraft that's sitting on the seabed; Jeremy Birch braves the arctic conditions to salvage two vessels that have fallen prey to the crushing ice conditions.

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.

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.

Mike helps fix the machines that keep one of the United States' biggest ports moving; he assists a team in moving a 3-million pound crane.

The American Museum of Natural History in NYC gets a cave-like extension; an arts center inspired by migrating birds is built on a lake in China; Boston University gains a fossil-free, Jenga-like tower.

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 DC-6 flies into fuel-freezing weather to deliver vital medicine. A rookie Coast Guard rescue swimmer faces his final helicopter test.

The islands of Italy come in all shapes and sizes; they are home to volcanoes, ancient civilizations and some of the bluest waters on Earth.

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 DC-6 flies into fuel-freezing weather to deliver vital medicine. A rookie Coast Guard rescue swimmer faces his final helicopter test.

The islands of Italy come in all shapes and sizes; they are home to volcanoes, ancient civilizations and some of the bluest waters on Earth.

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 DC-6 flies into fuel-freezing weather to deliver vital medicine. A rookie Coast Guard rescue swimmer faces his final helicopter test.

The islands of Italy come in all shapes and sizes; they are home to volcanoes, ancient civilizations and some of the bluest waters on Earth.

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.

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

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

Bundles of cedar wood tree trunks are smashed apart, releasing thousands of logs on the shoreline; Jeremy and his crew must work fast to recover the cargo.

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

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

Paid programming.

Bundles of cedar wood tree trunks are smashed apart, releasing thousands of logs on the shoreline; Jeremy and his crew must work fast to recover the cargo.

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.

A DC-6 flies into fuel-freezing weather to deliver vital medicine. A rookie Coast Guard rescue swimmer faces his final helicopter test.

The islands of Italy come in all shapes and sizes; they are home to volcanoes, ancient civilizations and some of the bluest waters on Earth.

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

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

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.

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

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

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

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

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

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

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

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

Get a bird's-eye view of a mysterious explosion in China and a quickly melting glacier on Earth's iciest continent; investigate an orange haze enveloping the Big Apple, then float over a toxic, too-hot-to-handle lake in New Zealand.

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

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

Paid programming.

Get a bird's-eye view of a mysterious explosion in China and a quickly melting glacier on Earth's iciest continent; investigate an orange haze enveloping the Big Apple, then float over a toxic, too-hot-to-handle lake in New Zealand.

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

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.

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

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.

Celebrating one of humanities biggest engineering achievements, the International Space Station, a meteor proof lab bigger than a football field, constructed by astronauts traveling 250 miles above us at 17,500 miles an hour.

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.

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

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

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.

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

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

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.

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

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

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

Examine mysterious holes in Isreal; explore a ghost village hidden in the Colombian jungle, a shipwreck off the coast of Sri Lanka and a gutted airplane fuselage abandoned in Iceland.

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

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

Paid programming.

Examine mysterious holes in Isreal; explore a ghost village hidden in the Colombian jungle, a shipwreck off the coast of Sri Lanka and a gutted airplane fuselage abandoned in Iceland.

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

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.

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.

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

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

An archaeological revolution has been underway for 15 years, driven by technology; from the rise of the first empire to the creation of the megalithic site of Newgrange, new technologies are revealing previously unknown chapters of antiquity.

Re-evaluate 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.

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

An archaeological revolution has been underway for 15 years, driven by technology; from the rise of the first empire to the creation of the megalithic site of Newgrange, new technologies are revealing previously unknown chapters of antiquity.

Re-evaluate 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.

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

An archaeological revolution has been underway for 15 years, driven by technology; from the rise of the first empire to the creation of the megalithic site of Newgrange, new technologies are revealing previously unknown chapters of antiquity.

Re-evaluate 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.

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

An archaeological revolution has been underway for 15 years, driven by technology; from the rise of the first empire to the creation of the megalithic site of Newgrange, new technologies are revealing previously unknown chapters of antiquity.

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

Investigate an abandoned village in the shifting sands on Dubai's outskirts and a collection of inexplicable stone circles in Colombia; a mysterious hilltop tower in Iran and a puzzling purple phenomenon in Chile's Atacama Desert.

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

Chris Ward sets out with Josh Moreira and Ward's younger brother to salvage a light aircraft that's sitting on the seabed; Jeremy Birch braves the arctic conditions to salvage two vessels that have fallen prey to the crushing ice conditions.

Investigate an abandoned village in the shifting sands on Dubai's outskirts and a collection of inexplicable stone circles in Colombia; a mysterious hilltop tower in Iran and a puzzling purple phenomenon in Chile's Atacama Desert.

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

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

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

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

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

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

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

Re-evaluate 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.

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

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

The history and evolution of America's most legendary spy plane.

In 1943, the United States engages in a new series of island-hopping invasions; the first stop is the Tarawa Atoll, where troops embark upon the largest amphibious invasion ever staged in the Pacific to fight one of the costliest battles of the war.

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

The history and evolution of America's most legendary spy plane.

In 1943, the United States engages in a new series of island-hopping invasions; the first stop is the Tarawa Atoll, where troops embark upon the largest amphibious invasion ever staged in the Pacific to fight one of the costliest battles of the war.

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

The history and evolution of America's most legendary spy plane.

In 1943, the United States engages in a new series of island-hopping invasions; the first stop is the Tarawa Atoll, where troops embark upon the largest amphibious invasion ever staged in the Pacific to fight one of the costliest battles of the war.

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

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.

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.

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

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.

Bundles of cedar wood tree trunks are smashed apart, releasing thousands of logs on the shoreline; Jeremy and his crew must work fast to recover the cargo.

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

Paid programming.

The story of Cleopatra's fall from grace in Egypt after the death of Julius Caesar; how Cleopatra tried to win the heart of Mark Antony, which turned out to be a fatal decision.

The East and the West fail in their attempts to limit the threat posed by nuclear weapons; the great power competition destroys the Arctic, causes missile accidents, and claims human lives in space.

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

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

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

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

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

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

Take a look at some of the escapes that took place during World War II.

A United States Army cook manages to stall Himmler's attempt to recapture Strasbourg.

When an infant is discovered dead in the River Thames, police uncover a dark underworld, where society's most vulnerable are being exploited.

Take a look at some of the escapes that took place during World War II.

A United States Army cook manages to stall Himmler's attempt to recapture Strasbourg.

When an infant is discovered dead in the River Thames, police uncover a dark underworld, where society's most vulnerable are being exploited.

A United States Army cook manages to stall Himmler's attempt to recapture Strasbourg.

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

When an infant is discovered dead in the River Thames, police uncover a dark underworld, where society's most vulnerable are being exploited.

A United States Army cook manages to stall Himmler's attempt to recapture Strasbourg.

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.

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

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

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.

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

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

Paid programming.

The islands of Italy come in all shapes and sizes; they are home to volcanoes, ancient civilizations and some of the bluest waters on Earth.

An archaeological revolution has been underway for 15 years, driven by technology; from the rise of the first empire to the creation of the megalithic site of Newgrange, new technologies are revealing previously unknown chapters of antiquity.

Re-evaluate 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.

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

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.

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

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

New discoveries and new science tell the story of how the ancient Mayans built such an incredible society in a tropical rainforest over two thousand years and then vanished.

Paying tribute to the brave, gravity-defying design of the U.S. National Medal of Honor Museum; traveling to Singapore for a look at a leaning tower of gambling, then exploring a New York City office building that lets the sun shine through.

At Cirque Du Soileil in Las Vegas, Mike embeds with the talented teams that maintain the amazing machines behind Cirque Du Soleil's stage shows.

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.

Paying tribute to the brave, gravity-defying design of the U.S. National Medal of Honor Museum; traveling to Singapore for a look at a leaning tower of gambling, then exploring a New York City office building that lets the sun shine through.

At Cirque Du Soileil in Las Vegas, Mike embeds with the talented teams that maintain the amazing machines behind Cirque Du Soleil's stage shows.

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.

Paying tribute to the brave, gravity-defying design of the U.S. National Medal of Honor Museum; traveling to Singapore for a look at a leaning tower of gambling, then exploring a New York City office building that lets the sun shine through.

At Cirque Du Soileil in Las Vegas, Mike embeds with the talented teams that maintain the amazing machines behind Cirque Du Soleil's stage shows.

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.

Paying tribute to the brave, gravity-defying design of the U.S. National Medal of Honor Museum; traveling to Singapore for a look at a leaning tower of gambling, then exploring a New York City office building that lets the sun shine through.

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

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

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

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

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

Charles de Salaberry is forced to rely on cunning tactics.

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

A journey across Central Italy from the air reveals the ancient Rome, the bloody medieval battles of Tuscany and the colossal marble quarries of Carrara.

Viewing Northern Italy from the air; the fashion capital of Milan; the canals of Venice; the peaks of the Dolomites; the colorful coast of Cinque Terre.

The islands of Italy come in all shapes and sizes; they are home to volcanoes, ancient civilizations and some of the bluest waters on Earth.

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

A journey across Central Italy from the air reveals the ancient Rome, the bloody medieval battles of Tuscany and the colossal marble quarries of Carrara.

Viewing Northern Italy from the air; the fashion capital of Milan; the canals of Venice; the peaks of the Dolomites; the colorful coast of Cinque Terre.

At Cirque Du Soileil in Las Vegas, Mike embeds with the talented teams that maintain the amazing machines behind Cirque Du Soleil's stage shows.

Paying tribute to the brave, gravity-defying design of the U.S. National Medal of Honor Museum; traveling to Singapore for a look at a leaning tower of gambling, then exploring a New York City office building that lets the sun shine through.

An engine fault threatens to ground an airliner, scientists and pilots team up to protect cattle from lion attack, damaged runway lights plunge a busy airport into darkness, and South Africa's top aerial display team wows crowds.

Two pilots try to build a new bush plane from 70-year-old designs. The Army gets its big guns airborne to protect America's north. Hurricane-force winds threaten Anchorage International, and NASA scientists blast off from Alaska.

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

An engine fault threatens to ground an airliner, scientists and pilots team up to protect cattle from lion attack, damaged runway lights plunge a busy airport into darkness, and South Africa's top aerial display team wows crowds.

Two pilots try to build a new bush plane from 70-year-old designs. The Army gets its big guns airborne to protect America's north. Hurricane-force winds threaten Anchorage International, and NASA scientists blast off from Alaska.

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

An engine fault threatens to ground an airliner, scientists and pilots team up to protect cattle from lion attack, damaged runway lights plunge a busy airport into darkness, and South Africa's top aerial display team wows crowds.

Two pilots try to build a new bush plane from 70-year-old designs. The Army gets its big guns airborne to protect America's north. Hurricane-force winds threaten Anchorage International, and NASA scientists blast off from Alaska.

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

An engine fault threatens to ground an airliner, scientists and pilots team up to protect cattle from lion attack, damaged runway lights plunge a busy airport into darkness, and South Africa's top aerial display team wows crowds.

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

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

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

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

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

Paid programming.

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

The Pacific Coast of Australia is home to Sydney's architectural icons, Byron Bay's beach breaks, perilous white-water adventures and the Great Barrier Reef, the largest living structure on Earth.

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

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

Western Australia is home to colossal gold mines, massive sheep stations, the world's largest shark, a 4x4 trail; it has Perth, the most isolated big city on Earth.

The Pacific Coast of Australia is home to Sydney's architectural icons, Byron Bay's beach breaks, perilous white-water adventures and the Great Barrier Reef, the largest living structure on Earth.

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

Two pilots try to build a new bush plane from 70-year-old designs. The Army gets its big guns airborne to protect America's north. Hurricane-force winds threaten Anchorage International, and NASA scientists blast off from Alaska.

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

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

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.

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.

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

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.

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.

Egyptologists examine ancient sites and relics to determine what brought the age of the pyramids to an end.

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.

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.

Egyptologists examine ancient sites and relics to determine what brought the age of the pyramids to an end.

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

The 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.

Veteran salvor Paul Hay and his team rescue a clam-dredging crew's harvest lost in a storm off the New Jersey coast; following an annual cleanup operation in New Zealand that salvages fishing equipment gone astray.

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

Paid programming.

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.

Veteran salvor Paul Hay and his team rescue a clam-dredging crew's harvest lost in a storm off the New Jersey coast; following an annual cleanup operation in New Zealand that salvages fishing equipment gone astray.

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 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.

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 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.

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.

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.