The Nazca Lines are alien-looking symbols carved into a remote desert more than a thousand years ago, and new discoveries might finally reveal what these strange images mean and if they explain the disappearance of the people who made them.

Intrepid archaeologists make groundbreaking discoveries as they work to unravel the mysteries of an Ice Age highway, challenging everything previously thought about prehistoric humans and how they came to the Americas.

The Nazca Lines are alien-looking symbols carved into a remote desert more than a thousand years ago, and new discoveries might finally reveal what these strange images mean and if they explain the disappearance of the people who made them.

The Iceman is the world's oldest and most perfectly preserved mummy; cutting-edge forensic technology reveals his darkest secrets, and these discoveries could change everything people know about the humans who lived 5,000 years ago.

The downfall of the powerful Maya city of Palenque continues to mystify archaeologists today; now, investigators gain rare access to explore lost tombs to reveal the truth behind this legendary city and the mystery behind its enigmatic queens.

The coliseums of Rome were brutal theaters of spectacle and death that helped control the sprawling Roman empire; now, archaeologists uncover the engineering secrets behind these majestic structures to reveal the truth behind the ancient Roman world.

Astronaut Leroy Chiao's spacewalk is interrupted by bright lights flying past; a flying saucer is photographed from the Apollo.

Life may have been found on Mars; mysterious Moon Pigeons.

Two astronauts trapped in the vacuum of space face a horrible death; the first close up images of Pluto show an alien landscape; residents of Houston struggle to explain videos of unidentified flying lights captured above their city at night.

Determining the age of the universe continues to be an elusive endeavor for scientists as their results are conflicting, and without a definitive answer, everything that's known about the cosmos could be completely wrong.

Earth's history is marked by one cosmic disaster after another, forging the path of human evolution; now, experts explore how the Earth has teetered on the verge of destruction.

The top-secret construction of a massive nuclear bunker remained concealed under a palatial West Virginia hotel for decades; experts reveal how this vast subterranean structure was one of the most closely guarded Cold War secrets in U.S. history.

A strange, centuries-old labyrinth built into an abandoned quarry was built by an eccentric millionaire, and no one knows why; but now, a new excavation into this mysterious 9,000-foot tunnel system might finally reveal its dark secrets.

Caverns hidden deep inside a remote mountain are home to a precious mineral found nowhere else on Earth; experts and treasure hunters use cutting-edge technology to follow rumors of a mysterious long-lost mine in search of a payday.

A hidden, subterranean city built within the Rock of Gibraltar is an immense fortress to control the seas during World War II; new discoveries reveal the secrets of a long-lost chamber with evidence of high-stakes espionage.

Hidden beneath the town of Ramsgate, England, lies a hidden network of over three miles of air raid tunnels; experts investigate and uncover an extensive WWII bomb shelter that became a permanent refuge for many civilians after a devastating attack.

Buried nearly a mile beneath the Black Hills of South Dakota is a cutting-edge laboratory at the forefront of astonishing scientific research; experts reveal advancements engineers achieved more than a century ago that keep it operating today.

A decommissioned missile launch facility in Kansas remained one of the best kept subterranean military secrets of the Cold War; experts reveal how this abandoned underground complex transformed into a state-of-the-art survival bunker.

Josh Gates explores daring journeys, including the Kon-Tiki balsa raft crossing the Pacific, NASA's lunar rover making tracks on the moon and an airplane flying around the world without the use of fuel.

Josh Gates recounts the death-defying exploits of Edmund Hillary and Tenzing Norgay, who summit Mount Everest; two submariners plunge seven miles under the Pacific; a pilot skydives from the edge of space.

Josh Gates explores how club members' swashbuckling exploits inspired Hollywood; a bullwhip-cracking archaeologist may be the real-life Indiana Jones; a Nazi mountaineer's life-changing "Seven Years in Tibet" became a Brad Pitt star turn.

Josh Gates boldly explores members' most heart-pounding journeys into space; Apollo 13 astronauts fight to bring their crippled spacecraft 238,000 miles back to Earth and futuristic SpaceShipOne could give others a chance to travel to space.

Josh recounts a Himalayan mission to find the yeti and a filmmaker's pursuit of the dangerous elephant king; the starving crew of an Antarctic expedition makes difficult choices to survive.

Josh Gates tackles history's most chilling polar adventures, including Robert Peary and Matthew Henson's brave push to the North Pole as well as Ernest Shackleton's epic survival in Antarctic ice.

Josh Gates boldly explores members' most heart-pounding journeys into space; Apollo 13 astronauts fight to bring their crippled spacecraft 238,000 miles back to Earth and futuristic SpaceShipOne could give others a chance to travel to space.

Josh recounts a Himalayan mission to find the yeti and a filmmaker's pursuit of the dangerous elephant king; the starving crew of an Antarctic expedition makes difficult choices to survive.

Josh Gates tackles history's most chilling polar adventures, including Robert Peary and Matthew Henson's brave push to the North Pole as well as Ernest Shackleton's epic survival in Antarctic ice.

Josh Gates explores how club members' swashbuckling exploits inspired Hollywood; a bullwhip-cracking archaeologist may be the real-life Indiana Jones; a Nazi mountaineer's life-changing "Seven Years in Tibet" became a Brad Pitt star turn.

Buried nearly a mile beneath the Black Hills of South Dakota is a cutting-edge laboratory at the forefront of astonishing scientific research; experts reveal advancements engineers achieved more than a century ago that keep it operating today.

A decommissioned missile launch facility in Kansas remained one of the best kept subterranean military secrets of the Cold War; experts reveal how this abandoned underground complex transformed into a state-of-the-art survival bunker.

Spaceships powered by atomic bombs; artificial rings encircle an entire star; Neil Armstrong's transmission feed cuts off when he spots strange lights on the moon; how can lightning talk to itself.

A piece of the sun seems to have vanished; the Hubble spots an unidentified object traveling faster than light.

A distant planet shows an Earth-like atmosphere; a glowing light suggests an atmosphere on the Moon; why there are blueberries on Mars.

Mars is infested with robots, orbiting the planet and roaming the Martian surface on a mission to uncover its secrets; now, Perseverance joins this dedicated group of machines to uncover if there is, or was ever, life on the Red Planet.

Dark Matter is thought to be the cosmic glue that holds the universe together, yet the search for it continues to eluded scientists today.

A villager captures a moment of horror as a mysterious series of explosions lights up a mountainside in India; experts investigate a possible link to lost plutonium during a Cold War spy mission that went disastrously wrong.

Cameras capture falling objects that explode into a colorful chain reaction over the skies of Andoya Island in Norway; experts investigate a secret WWII Nazi complex linked to a weapons technology that may have been discovered by the Russians.

Cameras onboard a massive cargo ship in the Black Sea capture the vessel buckling and breaking in half as if seized by a mysterious force; experts investigate a bizarre area of perilous waters linked to a history of Bermuda Triangle-like sinkings.

A vacationing family films waves of fire breaking along the shores of an Indonesian island; experts investigate a possible connection to a classified WWII beach-burning weapon developed by the British to incinerate invading armies.

A cube spins through the skies over Missouri, raising questions about its propulsion system.

Native American myths are steeped in the otherworldly, but new evidence and modern-day UFO sightings have experts rethinking these legends and depictions.

Investigators reveal the secret history of U.S. presidents and UFOs, from President Franklin D. Roosevelt's knowledge about a UFO battle over Los Angeles to President John F. Kennedy's alleged plan to share extraterrestrial secrets with the Russians.

Using archival audio recordings, official transcripts and incident reports, UFO researchers investigate what really happened during encounters between law enforcement personnel and UFOs.

UFO experts investigate whether the value, reverence and desire for gold is the result of extraterrestrial landings in the ancient past.

An exploration into whether breakthroughs such as high-energy lasers, antigravity technology and super-advanced aircraft are the result of human efforts alone or contact with UFOs.

UFO sightings have been caught on film across the United States, yet the government continues to deny the existence of extraterrestrials; recent news of the Pentagon's secret UFO program may reveal evidence of what the military has known for decades.

Although alien abduction claims are often dismissed as hoaxes or delusions, there are landmark cases that scholars struggle to refute; Calvin Parker retells his harrowing experience of being abducted near the Pascagoula River in Mississippi.

Evidence suggests contact with interstellar travelers in the distant past may have influenced humankind and many of its sacred sites.

UFO sightings have been caught on film across the United States, yet the government continues to deny the existence of extraterrestrials; recent news of the Pentagon's secret UFO program may reveal evidence of what the military has known for decades.

Although alien abduction claims are often dismissed as hoaxes or delusions, there are landmark cases that scholars struggle to refute; Calvin Parker retells his harrowing experience of being abducted near the Pascagoula River in Mississippi.

Evidence suggests contact with interstellar travelers in the distant past may have influenced humankind and many of its sacred sites.

An exploration into whether breakthroughs such as high-energy lasers, antigravity technology and super-advanced aircraft are the result of human efforts alone or contact with UFOs.

Native American myths are steeped in the otherworldly, but new evidence and modern-day UFO sightings have experts rethinking these legends and depictions.

Investigators reveal the secret history of U.S. presidents and UFOs, from President Franklin D. Roosevelt's knowledge about a UFO battle over Los Angeles to President John F. Kennedy's alleged plan to share extraterrestrial secrets with the Russians.

Earth is hit by 100 tons of rock from space every day; most burn up in the atmosphere, but a single rock wiped out the dinosaurs.

More than 100 million pieces of small space debris are floating around the Earth; a collision between two of these objects in low Earth orbit could be catastrophic.

When a massive star dies, it can direct a blast of radiation that could obliterate all life.

Aliens could be lethal killers who want to invade and plunder our world; a team of experts investigate extra-terrestrial beings and their threat to human life.

Until recently, black holes were only theoretical; scientists know that millions exist and some of them have the potential to be lethal to earth.

Experts discuss the many possible ways that could spark the beginning of the end for the universe, including when and why it would happen.

Volcanoes created more than 80% of our planet's surface, but explosive eruptions can be deadly; a journey under the earth to discover why volcanoes are so dangerous.

When water unleashes its rage upon the planet, it becomes the ultimate bringer of death; whether it's from rain washing over the ground, rivers bursting their banks, or failed efforts to stem the flow, flooding is as inevitable as it is unstoppable.

Hurricanes, typhoons and cyclones are all the same thing with different names, but what they also have in common is their destructive power.

Earthquakes occur when tectonic plates suddenly shift and shock waves shake the Earth's surface; they occur along fault lines -- the most active being the Ring of Fire in the Pacific Ocean and the San Andreas Fault on the American West Coast.

Experts investigate clues revealing evidence of a long-lost civilization in the Amazon that built giant cities of untold treasures.

Archaeologists are finding hard proof of the prehistoric civilization that once thrived in the Amazon; with the help of cutting-edge technology, these new discoveries reveal how these long-lost people built an advanced society in the jungle.

New discoveries reveal the mystery of what happened to the ancient superpower that once thrived in the Amazon jungles and, using cutting-edge archaeological methods, finding the reasons why the civilization fell.

Biblical scientists and scholars attempt to uncover evidence of lost cities.

Biblical scientists and scholars attempt to uncover evidence of lost cities.

Three teams face off in a festive engineering challenge that has them blasting trees into the center of Christmas Town, sending snowmen sky high and assisting Santa in his chimney ascent; failure to launch will have them on this year's naughty list.

Three teams of merry masterminds compete to see who can pack their pines with the most firepower, save Christmas Town from an Abominable Snowman and send toy soldiers to the gifting front lines; missing the mark gets their names on the naughty list.

The teams have to deliver letters, send decorations without breaking anything and give Santa's sleigh a turbo boost to claim the golden rocket tree-topper trophy.

Three teams face off in a festive engineering challenge that has them blasting trees into the center of Christmas Town, sending snowmen sky high and assisting Santa in his chimney ascent; failure to launch will have them on this year's naughty list.

Three teams of merry masterminds compete to see who can pack their pines with the most firepower, save Christmas Town from an Abominable Snowman and send toy soldiers to the gifting front lines; missing the mark gets their names on the naughty list.

The teams have to deliver letters, send decorations without breaking anything and give Santa's sleigh a turbo boost to claim the golden rocket tree-topper trophy.

Biblical scientists and scholars attempt to uncover evidence of lost cities.

Experts investigate clues revealing evidence of a long-lost civilization in the Amazon that built giant cities of untold treasures.

Archaeologists are finding hard proof of the prehistoric civilization that once thrived in the Amazon; with the help of cutting-edge technology, these new discoveries reveal how these long-lost people built an advanced society in the jungle.

Time travel may be more possible now than ever imagined, and today, cutting-edge technology and the latest research into black holes and wormholes is helping experts get much closer to discovering how to travel through time.

We don't yet know where the edge of the universe is or what happens there; but thanks to cutting-edge technology and new discoveries, experts might finally reveal the secrets of the phenomena.

The discovery of extraterrestrial life might face an impossible challenge: the physics of the universe itself; using cutting-edge tech, experts might be on the verge of a groundbreaking find, and the evidence could already be in hand.

A countdown some of the most important things to help you survive the holidays.

A countdown of some of the odd things that might be found at grandma's house.

A countdown some of the best Christmas gifts and how they're made.

A countdown the five strangest and unusual products in the show's history.

Ancient scriptures describe the Ark of the Covenant as possessing an almighty force with the capacity to kill; now, an expert team of archaeologists trace the ark's destructive path in a quest to discover the truth behind its mythical power.

According to biblical scripture, the prophet Jeremiah hides the Ark of the Covenant at a remote location for safekeeping; a team of archaeologists investigate sacred sites and ancient tombs to retrace the possible journey of this lost artifact.

The holy order of the Knights Templar are believed to have located and seized the Ark of the Covenant centuries ago; now, expert historians follow the trail of this elusive order to uncover the truth behind this sacred relic's mysterious journey.

Some allege that the Ark of the Covenant was stolen by King Solomon's son and taken to Ethiopia thousands of years ago; now, archaeologists investigate new, mysterious leads to uncover the secrets behind this lost relic's elusive journey.

Lost for centuries, scholars believe the Ark of the Covenant never left Jerusalem and remains buried beneath this ancient city; now, a pioneering team of archaeologists is on a quest to unearth the most famous and treasured artifact in human history.

Ancient documents and legends suggest that the Ark of the Covenant may have been stolen by Roman legions and hidden in Rome; a team of archaeologists explore mystery cults and ancient catacombs to uncover the truth behind this treasured artifact.

A labor strike in an Arizona mining town ends in a mass kidnapping and deportation, a unique homesteading community gets its start in the Old West, and a leaning Carolina lighthouse becomes part of Civil War history.

The notorious owner of this Georgia plantation once held a sale of nearly 450 enslaved people; appalled at her husband's cruelty, the man's wife wrote and published a journal about the atrocities she witnessed.

At a nondescript bowling alley in South Carolina, evidence of a peaceful student protest that turned deadly comes to light; a series of tunnels in L.A. becomes a shady place for resourceful people in this sunny city.

A remote site in Arkansas plays a major role in a high-stakes Cold War drama, an ancient ruin in Cambodia is ravaged by one man's cruel deception and a French fort becomes the symbol of a heroic but doomed resistance.

A ghost town in Sicily has deep roots in organized crime; an obscure asylum in Pennsylvania shocks America and inspires a revolution; a mansion in Ireland becomes embroiled in a bizarre kidnapping plot.

A rural town in Oregon is invaded by an eccentric cult, a battered building in Florida plays a major role in the cigar trade, and a junkyard palace in New Jersey becomes the subject of controversy and rumors of the supernatural.

An eerie prison with a dark past that became the setting of an iconic Hollywood movie and alien monoliths on a strange and remote island are deserted engineering projects, and new discoveries reveal how they were built and why they were abandoned.

A ghost town in Sicily has deep roots in organized crime; an obscure asylum in Pennsylvania shocks America and inspires a revolution; a mansion in Ireland becomes embroiled in a bizarre kidnapping plot.

A rural town in Oregon is invaded by an eccentric cult, a battered building in Florida plays a major role in the cigar trade, and a junkyard palace in New Jersey becomes the subject of controversy and rumors of the supernatural.

An eerie prison with a dark past that became the setting of an iconic Hollywood movie and alien monoliths on a strange and remote island are deserted engineering projects, and new discoveries reveal how they were built and why they were abandoned.

A remote site in Arkansas plays a major role in a high-stakes Cold War drama, an ancient ruin in Cambodia is ravaged by one man's cruel deception and a French fort becomes the symbol of a heroic but doomed resistance.

Ancient documents and legends suggest that the Ark of the Covenant may have been stolen by Roman legions and hidden in Rome; a team of archaeologists explore mystery cults and ancient catacombs to uncover the truth behind this treasured artifact.

A labor strike in an Arizona mining town ends in a mass kidnapping and deportation, a unique homesteading community gets its start in the Old West, and a leaning Carolina lighthouse becomes part of Civil War history.

A strange discovery by NASA's Mars Curiosity rover suggests the Red Planet was home to an alien nuclear war 300 million years ago; experts investigate if an extraterrestrial Armageddon transformed an Earth-like world into a wasteland.

When a former Area 51 insider alleges that the Roswell UFO incident was a nefarious Soviet conspiracy masterminded by Stalin, experts investigate if it was indeed an enemy plot against America -- or if the confession is just another cover-up.

When NASA begins a strange experiment to communicate with dolphins, experts investigate if it's a prelude to making alien contact; some fear that such a discovery could have apocalyptic consequences.

New astronomical research is beginning to reveal an invisible scaffold of dark matter known as the Cosmic Web, an intergalactic network that transformed the universe from a chaotic Big Bang into the structured beauty of the present day cosmos.

As the two Voyager spacecraft reach interstellar space, experts explore their astonishing discoveries and how their extended operation has transformed into the ultimate mission.

New discoveries reveal the truth behind the Loch Ness Monster, and experts investigate the world's most mysterious waters in search of evidence that a prehistoric monster could still be lurking in the deep.

New discoveries reveal the bloody origin of the feathered snake god, and experts investigate why the ancient Mesoamericans believed that human sacrifice was the only way to appease the deadly monster.

New discoveries suggest that a sea beast like the Kraken could have existed, and experts examine a strange monster that could give shocking answers into this underwater mystery.

A new excavation at the mysterious home of the Minoans leads to a startling discovery about real-life origins of the Minotaur, and experts decode artifacts that point to bloody human sacrifices for the ferocious monster.Guests: Joy Reidenberg, Margee Kerr, Brian Regal, Richard Schwab..

New discoveries uncover the dark secrets of Egypt's strange half-man, half-lion beast, revealing why the pharaohs were so intent on transforming into this powerful and ferocious monster.

The latest science reveals that demons aren't just the stuff of horror stories, and as experts investigate shocking new archaeological evidence, they uncover the gruesome methods used to exorcise humans of demonic possessions.Guests: Joy Reidenberg, Margee Kerr, Brian Regal, Richard Schwab..

Terrifying new discoveries reveal the bloody truth behind the legends of vampires, and experts investigate why people believed these monsters had a taste for human blood.

Werewolves were once so feared, people suspected of the power were hunted and killed, but even so, many admitted that they could become these deadly creatures, and new evidence reveals why a powerful hallucinogenic drug could be to blame.Guests: Brian Regal, Joy Reidenberg, Richard Schwab..

Satellite images capture an enormous X shape mysteriously carved with precision in the remote Nevada desert; experts investigate a military emergency landing field linked to one of the most astonishing test programs in aviation history.

Satellite images capture miles of aircraft precisely arranged in the vast Arizona desert; experts investigate the largest aircraft storage facility on Earth and the rotting remains of a defining moment in Cold War history.

Satellite images capture a mysterious group of pyramid-shaped structures in the arid, desert landscape of Arizona; experts investigate a highly controversial research facility designed to prepare humanity for life on another world.

A ghost ship appears overnight on the shores of Ireland; it may help shed light on the fate of vessels claimed by the most notorious patch of ocean on earth.

Aerial archaeologists capture a series of mysterious dots buried beneath the remote, frozen landscape of Finnmark, Norway; experts investigate and reveal revolutionary hunting techniques developed by the oldest surviving Norwegian tribe.

Satellite images capture a mysterious group of pyramid-shaped structures in the arid, desert landscape of Arizona; experts investigate a highly controversial research facility designed to prepare humanity for life on another world.

A ghost ship appears overnight on the shores of Ireland; it may help shed light on the fate of vessels claimed by the most notorious patch of ocean on earth.

Aerial archaeologists capture a series of mysterious dots buried beneath the remote, frozen landscape of Finnmark, Norway; experts investigate and reveal revolutionary hunting techniques developed by the oldest surviving Norwegian tribe.

Satellite images capture miles of aircraft precisely arranged in the vast Arizona desert; experts investigate the largest aircraft storage facility on Earth and the rotting remains of a defining moment in Cold War history.

The latest science reveals that demons aren't just the stuff of horror stories, and as experts investigate shocking new archaeological evidence, they uncover the gruesome methods used to exorcise humans of demonic possessions.Guests: Joy Reidenberg, Margee Kerr, Brian Regal, Richard Schwab..

Terrifying new discoveries reveal the bloody truth behind the legends of vampires, and experts investigate why people believed these monsters had a taste for human blood.

Trick shots; extreme mountain unicyclists; a relaxing hot bath of chili sauce.

Tattoo machine; building an engine out of paper; a giant swing.

Separating scientific fact from science fiction; testing the limits of paper; selfie with a tornado; giant, ornery alligators roaming around on golf courses.

Using cutting-edge forensic analyses, some of the world's leading investigative experts uncover the stunning truth behind compelling mysteries from ancient times to the recent past.

George sends Greg to the World of Creation to learn more about traditional canning methods, which blend timeless craftsmanship with cutting-edge innovations to safeguard tomorrow's harvests.

A stunt driver goes in disguise and takes a driver's test; a stranger gets way too close for comfort; a movie trailer voice-over guy narrates people's lives as they walk down the street.

Startling new evidence suggests that Hitler's second-in-command was secretly replaced by a doppelganger to escape war crimes and impending justice; armed with cutting-edge forensic science, a team of experts investigates.

Three inmates are said to have escaped from Alcatraz prison, but even today, it's never been proven; new evidence might finally crack this notorious cold case, as experts use forensic science and cutting-edge technology to investigate fresh leads.

American diplomats stationed in Cuba begin to experience a bizarre mixture of noxious neurological symptoms and seem to be under a mysterious attack; experts use cutting-edge forensic science to determine if a sinister, sonic weapon is at play.

Brand-new evidence reveals the secrets of a Nazi program to build a nuclear bomb; using cutting-edge science and technology, experts uncover classified files that reveal how close Hitler came to this terrifying super weapon.

Beneath Yellowstone National Park is one of the world's largest active volcanoes, and it's poised to erupt at any moment; experts use seismic technology and visual imaging to reveal its catastrophic threat.

El Dorado, the legendary city of gold, captivated Europeans in the 16th and 17th centuries, sparking endless quests for hidden treasures; fueled by greed, these expeditions led to the loss of countless lives.

Mentioned twelve times in the canonical Gospels, Mary Magdalene remains one of the Bible's most mysterious and controversial figures. Despite her prominence, little is known about her, and depictions of her have varied widely.

Tutankhamun, Egypt's teenage pharaoh, leaves an enduring legacy in the 10 short years he ruled; given questions surrounding his untimely death, Tutankhamun remains one of history's enigmas.

The mystery of Noah's Ark, believed to rest in the snow-covered Ararat Mountains, has fascinated explorers for years. Two separate expeditions claim to have found it in different locations, sparking debates on whether the story is myth or reality.

In 1532, Spanish conquistadors encounter the advanced Inca Empire; despite their sophisticated infrastructure, the Inca falls within decades; the story of how a powerful empire is overtaken by a small group of conquistadors remains mysterious.

The ten plagues of Egypt are supposedly sent by God to convince Pharaoh to free the Israelites; some scientists link these events to a volcanic eruption or climate change; could these be natural occurrences or are they divine warnings?

Rameses II, Egypt's "ruler of rulers," reigned for over 60 years, leading Egypt into a golden age. Despite his fame, mysteries linger about his wife Nefertari and the truth of his death.

The Roman Empire fell in the year 476, yet questions linger; did it truly fall or does it continue as the Byzantine Empire? What caused its demise? The debate remains controversial even among modern historians.

The ten plagues of Egypt are supposedly sent by God to convince Pharaoh to free the Israelites; some scientists link these events to a volcanic eruption or climate change; could these be natural occurrences or are they divine warnings?

Rameses II, Egypt's "ruler of rulers," reigned for over 60 years, leading Egypt into a golden age. Despite his fame, mysteries linger about his wife Nefertari and the truth of his death.

The Roman Empire fell in the year 476, yet questions linger; did it truly fall or does it continue as the Byzantine Empire? What caused its demise? The debate remains controversial even among modern historians.

In 1532, Spanish conquistadors encounter the advanced Inca Empire; despite their sophisticated infrastructure, the Inca falls within decades; the story of how a powerful empire is overtaken by a small group of conquistadors remains mysterious.

El Dorado, the legendary city of gold, captivated Europeans in the 16th and 17th centuries, sparking endless quests for hidden treasures; fueled by greed, these expeditions led to the loss of countless lives.

Mentioned twelve times in the canonical Gospels, Mary Magdalene remains one of the Bible's most mysterious and controversial figures. Despite her prominence, little is known about her, and depictions of her have varied widely.

Skilled souls who use their science to thrill; close encounters in the wild; the world's fastest skateboarder; a trapeze at 300 feet.

Boiling science down to its component parts; these pioneers have wrestled with the forces of the universe and faced the elements in order to capture something extraordinary.

In search of Mother Nature's biggest oh-my-god moments; cuddly bears, criminal ferrets and an entire island made from trash; The quest for the weirdest, wildest and wackiest nature lovers on the internet.

Rubber gloves; soap carvings; aircraft cabinets; motorcycle brake locks.

Taking a look at how everyday items like powder horns, handcrafted molds, perogies and inner tubes are made.

Taking a look at how everyday items like lace antique frame replicas, orchids and unicycle wheel hubs are made.

Taking a look at how everyday items like external hard drives, frozen shrimp, Thai rice boxes and paper towels are made.

The host explains the making of everyday items that include tea, the finials of roofs, artificial flowers and alloy wheels.

Gel caps; playground spring riders; frozen pancakes; natural rubber.

Steel shipping drums; police whistles; miniature train cars; glass blocks.

Ice cream cones; tent trailers; shoe polish; pliers.

Skeletal replicas; ice buckets and servers; dining chairs; in-ground pools.

Automatic sliding doors; gin; firearms restoration.

Scuba lights; convertible sandals; racecar simulators; and fiberglass doors.

Wood windows; woven cashmere fabric; plastic recycling machines.

The mangled mummy of a pharaoh is a 3,000-year-old cold case that has brand-new leads; a team of experts in Egyptian archaeology and criminal forensics investigates fresh evidence to discover the truth behind the brutal death.

The mysterious mummy of Ramesses V reveals a shocking tale of bitter family rivalry, civil insurrection and a cause of death that ultimately pushed ancient Egypt to the edge of collapse.

The horrifying remains of the Screaming Mummy have haunted archaeologists for decades, but experts uncover new evidence to reveal the treacherous conspiracy that led to the mummy's grisly end.

A brand-new discovery inside a 3,000-year-old treasure chest may lead experts to the Egyptian pharaoh who was erased from history: a woman named Hatshepsut, who was one of the most controversial and successful pharaohs of all time.

Leading scientists and Egyptologists use state-of-the-art forensics to investigate the Niagara Falls mummy and search for its true identity; how a legendary ancient Egyptian pharaoh ended up on the other side of the world.

Cutting-edge science reveals new discoveries about the mutilated mummy of a young woman with a secret link to Tutankhamun; as experts use modern-day criminal forensics to follow fresh leads, the bloody trail leads straight to the Boy King.

The world's leading Egyptologists are on a quest to uncover the secrets of Howard Carter's history-making discovery of Tutankhamun's tomb on the 100th anniversary of its discovery.

Don Wildman travels to Alexandria, Egypt, in search of the lost tomb of Cleopatra, where he hopes to discover the true legacy of one of history's most mysterious and iconic female leaders.

The world's leading Egyptologists are on a quest to uncover the secrets of Howard Carter's history-making discovery of Tutankhamun's tomb on the 100th anniversary of its discovery.

Don Wildman travels to Alexandria, Egypt, in search of the lost tomb of Cleopatra, where he hopes to discover the true legacy of one of history's most mysterious and iconic female leaders.

Cutting-edge science reveals new discoveries about the mutilated mummy of a young woman with a secret link to Tutankhamun; as experts use modern-day criminal forensics to follow fresh leads, the bloody trail leads straight to the Boy King.

The mysterious mummy of Ramesses V reveals a shocking tale of bitter family rivalry, civil insurrection and a cause of death that ultimately pushed ancient Egypt to the edge of collapse.

The horrifying remains of the Screaming Mummy have haunted archaeologists for decades, but experts uncover new evidence to reveal the treacherous conspiracy that led to the mummy's grisly end.

Neil Armstrong enters an unexplained spin; an Apollo 17 photo seems to show a US military outpost on the Moon; possible alien life swimming in the oceans of Jupiter's moons.

Lost tapes show that Apollo astronauts heard unexplained transmissions on the far side of the moon; an amateur astronomer finds an odd disturbance in Martian atmosphere; an unidentified object in Earth orbit starts stalking Russian spacecraft.

After NASA's New Horizons spacecraft flies by Pluto, it encounters a strange alien world that shuts down the probe's computers; experts investigate if the mysterious object is an alien spacecraft hiding at the edge of the solar system.

The evolution of life on Mars before a series of cataclysmic events transformed the planet from a watery world to a hostile one; scientists believe life will find a way to continue despite the setbacks.

Recent evidence could explain how supermassive black holes grow so big; neither dark matter nor cannibalism can fully explain these beasts, but the latest science may finally provide an answer.

Dinosaur fossil season has begun, and Montana rancher Clayton Phipps finds what might be an extremely rare and valuable fossil on his family's property.

Clayton Phipps continues his excavation of a rare carnivorous dinosaur on his Montana ranch; Mike Harris and son Jake prepare to sell their prized tyrannosaurus-rex fossil; Aaron Bolan hunts for an ankylosaurus.

Clayton Phipps and his team prepare to flip a 20,000-pound carnivore fossil out of the earth and onto a flatbed to get it to the lab for analysis; Mike Harris hunts for a duckbill skull; Jared Hudson uncovers an ancient reptile.

Clayton must haul his 20,000-pound dinosaur fossil over 200 miles to a lab where it will finally be identified; the Harris/Bolan clan chases poachers off of their land; Jared makes a last-ditch effort to bring in some money this season.

Clayton returns to his ranch in Montana to hunt for quick finds at Old Faithful. In Wyoming, Mike Harris and his team continue excavating their triceratops site hoping to uncover the valuable horns.

In Montana, Clayton Phipps prepares to learn if his carnivore skeleton belongs to a tyrannosaurus rex or the controversial nanotyrannus; in Wyoming, Mike Harris and Aaron Bolan race against the impending winter digging at a promising new site.

Exploring mysterious tunnels beneath Denver's airport, capitol building and downtown to investigate rumors of a secret organization that operates below; in Ohio, trying to uncover the ancient secrets of a giant mound shaped like a serpent.

Rob Nelson investigates the mysterious pattern of rocks at the bottom of Lake Michigan known as Underwater Stonehenge; at the notorious Alcatraz prison, Rob uses state-of-the-art technology in search of rumored escape tunnels.

Descending into a cave 30 feet beneath Texas in search of evidence of a mass extinction event; heading to Lake Michigan to investigate an unexplained, Bermuda Triangle-like phenomenon that has caused ships to disappear for centuries.

Investigating rumors of a secret underground escape route used by the infamous gangster Al Capone; trying to uncover who or what built a vast landscape of earthen mounds in Washington state.

Examining a set of bizarre markings that suggest a violent clash between prehistoric beasts; in California, Rob investigates to see if a strange lake is a home to alien life.

Heading to California to investigate a network for major fault lines that could set off an unprecedented mega-quake; he explores a mysterious sinkhole that some believe is an endless pit to the center of the Earth.

Investigating a cluster of ancient ruins in New England that suggest Europeans arrived in the Americas almost 1,000 years before Columbus; heading to California where a dormant super volcano may be showing new signs of life.

Examining a set of bizarre markings that suggest a violent clash between prehistoric beasts; in California, Rob investigates to see if a strange lake is a home to alien life.

Heading to California to investigate a network for major fault lines that could set off an unprecedented mega-quake; he explores a mysterious sinkhole that some believe is an endless pit to the center of the Earth.

Investigating a cluster of ancient ruins in New England that suggest Europeans arrived in the Americas almost 1,000 years before Columbus; heading to California where a dormant super volcano may be showing new signs of life.

Investigating rumors of a secret underground escape route used by the infamous gangster Al Capone; trying to uncover who or what built a vast landscape of earthen mounds in Washington state.

In Montana, Clayton Phipps prepares to learn if his carnivore skeleton belongs to a tyrannosaurus rex or the controversial nanotyrannus; in Wyoming, Mike Harris and Aaron Bolan race against the impending winter digging at a promising new site.

Exploring mysterious tunnels beneath Denver's airport, capitol building and downtown to investigate rumors of a secret organization that operates below; in Ohio, trying to uncover the ancient secrets of a giant mound shaped like a serpent.

Apollo 12 astronauts bring back something alive from the moon; NASA tracks an asteroid heading towards Earth but make an incredible discovery.

Three cosmonauts mysteriously die as they re-enter Earth's atmosphere and NASA needs to know why; a declassified document shows a CIA plan to use a space disaster as a cover to start World War 3.

When NASA discovers something strange on Saturn's biggest moon, experts investigate if aliens feeding on the world's electric atmosphere could be the culprit; the disturbing evidence points to an apocalypse if these monsters ever make it to Earth.

Dark matter is the biggest mystery of the cosmos; scientists know that it has been vital to our universe since its birth, and new discoveries reveal that it could create black holes, cause mass extinctions, and might even shape life on Earth itself.

Exploring the real-life death stars in the cosmos that could snuff out Earth without much effort; the science of the destructive power behind six of the deadliest stars; vampire stars, supernovas and rogue stars.

A Russian radio station has broadcast a signal nonstop since the Cold War, and no one knows why; experts use hi-tech methods to investigate what it is and what might happen if it ever stops.

When a powerful radio beam originating from deep space is detected by experts on Earth, some suspect it's hard evidence of extraterrestrial life; new investigations into this shocking signal might reveal the truth.

When someone picks up a radio distress call from a seven-year-old boy lost alone in the desert, authorities embark on a search-and-rescue mission to find him; as the hunt continues, the case becomes more and more mysterious.

Experts use cutting-edge technology to investigate a mysterious phenomenon at the tomb of a 3,000-year-old Egyptian pharaoh.

When two experts build their own radio-listening station to intercept the secret communications of American and Soviet astronauts, they capture traces of a haunting voice that may be a lost Russian cosmonaut.

When a U.S. Air Force intercept aircraft chases after a UFO, it vanishes forever without a trace; a new investigation tries to uncover what caused this mysterious disappearance.

U.N. Peacekeeper develops a mysterious power to fight off a deadly foe.

An Infantryman encounters an otherworldly presence on a training mission.

An unknown presence pulls an Armed Forces officer into a living nightmare.

An unearthly presence at a nuclear launch site in Cyprus visits a UN peacekeeper and helps him fight off a deadly enemy.

An intelligence analyst on a secret mission makes an unearthly discovery.

A Russian soldier describes being lured into a swamp by an unnatural entity; an Ohio military base with a UFO connection; an interview with a US Air Force colonel whose alien-craft sightings are finally confirmed.

A Russian Infantryman fights an unknown presence in a Chechnyan forest.

An intelligence analyst on a secret mission makes an unearthly discovery.

A Russian soldier describes being lured into a swamp by an unnatural entity; an Ohio military base with a UFO connection; an interview with a US Air Force colonel whose alien-craft sightings are finally confirmed.

A Russian Infantryman fights an unknown presence in a Chechnyan forest.

An unearthly presence at a nuclear launch site in Cyprus visits a UN peacekeeper and helps him fight off a deadly enemy.

When a U.S. Air Force intercept aircraft chases after a UFO, it vanishes forever without a trace; a new investigation tries to uncover what caused this mysterious disappearance.