Discoveries reveal what really happened at an abandoned industrial complex on the shores of Lake Michigan that was once a top-secret military compound.

A strange bunker in a landscape once belonged to a dictator whose paranoid fantasies drove elaborate feats of engineering; new discoveries reveal the secrets of these structures and the nightmares that built them.

An eerie set of buildings in Paris is evidence of an unspeakable evil; new discoveries reveal the horrific things that happened here, and why they were abandoned.

Discoveries reveal what really happened at an abandoned industrial complex on the shores of Lake Michigan that was once a top-secret military compound.

Abandoned towers in southern Greece are the ruins of a warrior civilization descended from the Spartans; new discoveries reveal the role these towers played during generations of blood feuds among the clans that lived here.

Jeremy Wade examines new evidence that could finally reveal what happened to aviator Amelia Earhart; Jeremy investigates a strange anchor found in the Mediterranean Sea.

Jeremy Wade investigates the infamous shipwreck of the Titanic; locals are baffled when a bag containing 54 severed human hands is found on the banks of a Siberian river.

A mars mission captures an image of a strange structure on the planet; an intriguing sight on the dark side of the moon; a planet-eating star gives scientists a peek of Earth's bleak future.

When the Soviet Union unveils its own space shuttle, the CIA hatches a secret revenge plot; recent discoveries shed new light on the destruction of Sodom and Gomorrah; a missing nuclear weapon could threaten a NASA base in the Arctic.

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

Quasars are the brightest and most powerful objects in the universe, and though they have shaped the cosmos, they might ultimately destroy everything that exists.

Our solar system hides a dark and violent past and new discoveries reveal that Earth and the planets were formed from the destruction of alien worlds that came before us.

Mary Magdalene played a pivotal role in early Christianity and witnessed the execution and resurrection of Jesus Christ; experts investigate the truth behind her mysterious disappearance and embark on a quest to locate her undiscovered remains.

Uncover the true stories surrounding great treasures, long-held conspiracy theories, ancient relics and lost civilizations as experts analyze and investigate history's most astonishing mysteries.Guests: Lionel Fanthorpe..

After seizing power in 1933, Adolf Hitler began systematically transforming a peaceful German population into a ruthless war machine; experts investigate the innovative methods used by the Nazis to indoctrinate and control the will of its citizens.

The location of King Solomon's Mines has baffled historians for centuries and continues to lure treasure hunters today; archaeologists investigate evidence that may uncover the unlikely truth behind this source of untold riches.

A subterranean Neolithic temple discovered on the island of Malta contains the skeletal remains of thousands of humans; experts use forensic archaeology to investigate elongated skulls that may unlock the secrets of an advanced, lost civilization.Guests: Lionel Fanthorpe..

"The Codex Gigas," also known as the "Devil's Bible," is a giant medieval tome that has evoked fear for centuries and believed to contain a malevolent power; experts investigate its legendary secrets and uncover the mystery behind its author.

The CIA's MK-Ultra program sought to create mind control methods through unethical human experimentation, and now, experts investigate classified documents that reveal the horrific atrocities that were carried out in the pursuit of national security.Guests: Lionel Fanthorpe..

Aerial archaeologists capture bizarre, spider-like markings etched deep into the mountains of Northern Spain; experts investigate an ancient site that contained one of the largest and most important gold mining operations of the Roman Empire.

Satellite images capture a series of enormous zigzagging patterns carved into the remote woodlands of Poland; experts investigate a clandestine Nazi base linked to a doomed operation that played a pivotal role in the downfall of WWII Germany.

Aerial archaeologists use laser imaging to capture a distinct star-shaped pattern carved into the marsh of a Florida swamp; experts investigate and reveal a lost Civial War fort linked to an extraordinary community with a tragic past.

Aerial drone imaging captures clusters of enormous, perfectly round holes scattered along the coast of the Dead Sea in Israel; experts reveal a history of destructive water diversion linked to massive sinkholes devouring the region.

Satellite images capture a bizarre pattern of enormous circular clouds obscuring an island in the eastern Atlantic; experts investigate and uncover evidence of an unfolding natural disaster that could potentially threaten millions of lives.

Aerial drone imaging captures oddly shaped industrial-sized towers mysteriously situated in a forest clearing near Moscow; experts investigate a lost Soviet era military compound and the development of a catastrophic electromagnetic weapon.

Aerial drone imaging captures clusters of enormous, perfectly round holes scattered along the coast of the Dead Sea in Israel; experts reveal a history of destructive water diversion linked to massive sinkholes devouring the region.

Satellite images capture a bizarre pattern of enormous circular clouds obscuring an island in the eastern Atlantic; experts investigate and uncover evidence of an unfolding natural disaster that could potentially threaten millions of lives.

Aerial drone imaging captures oddly shaped industrial-sized towers mysteriously situated in a forest clearing near Moscow; experts investigate a lost Soviet era military compound and the development of a catastrophic electromagnetic weapon.

Aerial archaeologists use laser imaging to capture a distinct star-shaped pattern carved into the marsh of a Florida swamp; experts investigate and reveal a lost Civial War fort linked to an extraordinary community with a tragic past.

"The Codex Gigas," also known as the "Devil's Bible," is a giant medieval tome that has evoked fear for centuries and believed to contain a malevolent power; experts investigate its legendary secrets and uncover the mystery behind its author.

The CIA's MK-Ultra program sought to create mind control methods through unethical human experimentation, and now, experts investigate classified documents that reveal the horrific atrocities that were carried out in the pursuit of national security.Guests: Lionel Fanthorpe..

The boys test whether a trench corner can slow down a shockwave and save a soldier.

Testing if a motorcycle can travel across water at high speeds; a parachute made from hotel room contents.

James Cameron joins Adam and Jamie to try to answer the questions, did Jack (from Cameron's "Titanic") needlessly die? Is it possible that Rose and Jack could have both fit on the wooden board and survived together?Guests: James Cameron..

Céline and Fabien Cousteau use cutting-edge tech to investigate one of the most credible UFO sightings in history, when a strange alien craft was spotted crashing into the ocean; what they discover might reveal evidence of extraterrestrial contact.

A dangerous stretch of water in the Mediterranean is the resting place of an infamous sunken ship, and using the latest tech, Céline and Fabien Cousteau investigate if it was deliberately attacked by spies on a top-secret mission.

Céline and Fabien Cousteau use cutting-edge tech to hunt for a long-lost shipwreck in the Bermuda Triangle, and if their top-secret clues are right, they might uncover new evidence that explains the disappearances in this deadly and mysterious place.

Stel and Jess trek to the Black Sea, where they investigate a 7,000-year-old skeleton buried in gold treasure, and uncover evidence of an ancient catastrophe that could be the basis for Noah's flood and the destruction of Atlantis.

Stel and Jess search underwater ruins off the coast of Greece that could be the ruins of Atlantis.

Stel and Jess investigate a mysterious Greek island where an advanced ancient civilization built a massive marble pyramid.

Stel and Jess dig into unexplored archeological sites along the Adriatic coast of Croatia where underwater relics from an ancient bridge system lead them to an age-old legend of a lost city and into a massive sinkhole that could swallow a city whole.

Stel and Jess sail to Sicily to explore Europe's largest active volcano; their investigation leads them to a hidden labyrinth and a mysterious underwater monolith.

Stel and Jess investigate cave paintings in Turkey that match an advanced civilization that built the world's oldest city; tracing the ancient migration to the coast, they discover a shoreline and ruins of a lost city right under their feet.

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 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 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 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 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 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 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 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.

Stel and Jess sail to Sicily to explore Europe's largest active volcano; their investigation leads them to a hidden labyrinth and a mysterious underwater monolith.

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.

Stel and Jess sail to Sicily to explore Europe's largest active volcano; their investigation leads them to a hidden labyrinth and a mysterious underwater monolith.

Viewer requested myths include an underwater bike ride, if you can know something "like the back of your hand," and the potty dance.

Stel and Jess investigate cave paintings in Turkey that match an advanced civilization that built the world's oldest city; tracing the ancient migration to the coast, they discover a shoreline and ruins of a lost city right under their feet.

Viewer requested myths include an underwater bike ride, if you can know something "like the back of your hand," and the potty dance.

Celebrity chef Alton Brown helps the team discover if it can cook lasagna in a dishwasher or a meal beneath the hood of a car.

Cartridge blades; chocolate banana loaves; vending machines; dive computers.

Adam and Jamie see if certain sound frequencies can convince people of paranormal activity; finding out if the smell of fear exists.

How ultra-thin glass, pallet dismantling machines, cupcakes and seamless stainless steel tubes are made.

Cartridge blades; chocolate banana loaves; vending machines; dive computers.

How ultra-thin glass, pallet dismantling machines, cupcakes and seamless stainless steel tubes are made.

Learning how handcrafted and factory items such as potash, leather bracelets, wild rice, and hex key L-Wrenches are made.

Learning how metal nail files, birchbark canoes, cruiser boat hardtops and high-voltage circuit breakers are made.

An insight into the manufacturing processes of tasers, canned soup, jaw harps and mouth bows and diving boards.

An insight into the production process for Navajo rugs, crude oil, kaleidoscopes and titanium dental implants.

Space pens; reef aquariums; metal caskets; composite bike wheels.

An insight into how native healing drums, raisins, stereoscopic viewers and ribbon microphones are produced.

CCD semiconductors; airline meals; paper cups; trumpets.

Padlocks; hair clippers; wooden shoes; synthetic leather.

In 373 B.C., the Greek city of Helike vanished; archaeologists believe they've found the ruins of the great lost metropolis; using CGI, experts re-create the city's final moments and reveal its links to the greatest lost land of all -- Atlantis.

Racing shells; stainless-steel sinks; leather; pedal steel guitars.

Swords; pontoons; grandfather clocks; fuses.

In 373 B.C., the Greek city of Helike vanished; archaeologists believe they've found the ruins of the great lost metropolis; using CGI, experts re-create the city's final moments and reveal its links to the greatest lost land of all -- Atlantis.

The lost city of Olous: A great metropolis submerged in the Mediterranean; archaeologists uncover its secrets using pioneering technology and CGI reconstruction.

Hadrian's Villa is the largest Roman palace ever constructed and demonstrates the opulent peak of Rome's ancient engineering; experts investigate secrets that could reveal the truth behind one of Rome's most enigmatic emperors.

The Dendera Temple is one of the best-preserved temples in all of Egypt; experts decipher its mystifying zodiac images and uncover the ceremonial events that took place at this sacred site, and stunning CGI rebuilds this grand complex in its prime.

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

Experts use the latest forensic archaeology to investigate the true story behind the disappearance of more than 100 English colonists who settled on Roanoke Island in 1587.

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

Experts use the latest forensic archaeology to investigate the true story behind the disappearance of more than 100 English colonists who settled on Roanoke Island in 1587.

The magnificent tomb of Alexander the Great mysteriously vanishes and becomes a legend; using CGI, investigators piece together the evidence to reveal where his tomb lies and what it might look like.

Experts use the latest forensic archaeology to investigate the true story behind the disappearance of more than 100 English colonists who settled on Roanoke Island in 1587.

The magnificent tomb of Alexander the Great mysteriously vanishes and becomes a legend; using CGI, investigators piece together the evidence to reveal where his tomb lies and what it might look like.

Experts use the latest forensic archaeology to investigate the true story behind the disappearance of more than 100 English colonists who settled on Roanoke Island in 1587.

The magnificent tomb of Alexander the Great mysteriously vanishes and becomes a legend; using CGI, investigators piece together the evidence to reveal where his tomb lies and what it might look like.

The magnificent tomb of Alexander the Great mysteriously vanishes and becomes a legend; using CGI, investigators piece together the evidence to reveal where his tomb lies and what it might look like.

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

The lost city of Olous: A great metropolis submerged in the Mediterranean; archaeologists uncover its secrets using pioneering technology and CGI reconstruction.

Hadrian's Villa is the largest Roman palace ever constructed and demonstrates the opulent peak of Rome's ancient engineering; experts investigate secrets that could reveal the truth behind one of Rome's most enigmatic emperors.

In 2013, the USS Jimmy Carter deployed on a classified mission that received a presidential citation of heroism.

In 2013, the USS Jimmy Carter deployed on a classified mission that received a presidential citation of heroism.

Uncovered documents reveal a black file containing studies of werewolves, sprites and floating orbs; Mike Baker investigates how the U.S. government may have funded a classified program directly focused on the research of paranormal phenomena.

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.

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.

Neutron stars are strange and violent phenomena that defy the laws of physics, and new discoveries reveal that these bizarre nightmares are far more deadly than previously believed, with the power to destroy planets and even other stars.

Neutron stars are strange and violent phenomena that defy the laws of physics, and new discoveries reveal that these bizarre nightmares are far more deadly than previously believed, with the power to destroy planets and even other stars.

Supernovas are the violent death of giant stars, and new discoveries reveal that these cataclysmic events create the elements that are essential to all life in the universe.

A strange cave freezes in the summer and melts in the winter; a massive sand dune swallows a small child in an instant.

A strange cave freezes in the summer and melts in the winter; a massive sand dune swallows a small child in an instant.

A massive supervolcano beneath Naples, Italy, may be on the verge of erupting again, which could have apocalyptic consequences across the planet; Rob Nelson and Stefan Burns use cutting-edge technology to investigate this disturbing new evidence.

New theories claim that the legendary sunken city of Atlantis actually could have been in the Americas; Rob Nelson and Stefan Burns investigate evidence that might shed more light on one of the world's greatest mysteries.

Searching for the fabled lost Temple Treasures of Jerusalem and King Solomon's hidden mines.

When an infamous pirate city sunk into the sea after a massive earthquake, a wealthy pirate's treasure may have disappeared with it; a hunt for the legendary lost pirate treasure of Henry Morgan.

Millions of dollars of stolen Gold Rush treasure is rumored to have been stashed in a cave in Northern California; the search for the legendary treasure.

A legendary train filled with stolen Nazi gold is said to be hidden in Poland; using cutting-edge technology, Rob Nelson and Stefan Burns explore deep underneath the earth's surface and in abandoned Nazi tunnels in search of the infamous legend.

Experts uncover a mysteriously abandoned underground complex that may have hid something very dark.

Experts uncover a mysteriously abandoned underground complex that may have hid something very dark.

As the Nazis embark on their dominate rise to power, a massive construction project secretly begins across Eastern Germany; using the latest tech, experts uncover an elaborate network of underground tunnels and bunkers with frightening ambitions.

A medieval castle-like complex in the remote mountains of Germany contains dark secrets to the Nazi's plan for world domination; experts investigate and uncover a nefarious training facility designed to groom elite Nazi personnel.

When the Nazis took Ksiaz Castle in 1941, it wasn't for the view, and they got to work turning it into a fortress; secret staircases and elevators were built, while underneath, a vast network of tunnels was taking form.

Guided missiles, the Wasserfall, and the potentially war-changing V2 were dreamed up and tested in a base in Peenemunde.

The skeletal remains of strange structures are clues to a mysterious research installation secretly built by the Nazis in Western Poland; experts investigate and uncover top-secret military fuel development with a catastrophic purpose.

When the Nazis took Ksiaz Castle in 1941, it wasn't for the view, and they got to work turning it into a fortress; secret staircases and elevators were built, while underneath, a vast network of tunnels was taking form.

Guided missiles, the Wasserfall, and the potentially war-changing V2 were dreamed up and tested in a base in Peenemunde.

The skeletal remains of strange structures are clues to a mysterious research installation secretly built by the Nazis in Western Poland; experts investigate and uncover top-secret military fuel development with a catastrophic purpose.

A medieval castle-like complex in the remote mountains of Germany contains dark secrets to the Nazi's plan for world domination; experts investigate and uncover a nefarious training facility designed to groom elite Nazi personnel.

Millions of dollars of stolen Gold Rush treasure is rumored to have been stashed in a cave in Northern California; the search for the legendary treasure.

Millions of dollars of stolen Gold Rush treasure is rumored to have been stashed in a cave in Northern California; the search for the legendary treasure.

A legendary train filled with stolen Nazi gold is said to be hidden in Poland; using cutting-edge technology, Rob Nelson and Stefan Burns explore deep underneath the earth's surface and in abandoned Nazi tunnels in search of the infamous legend.

Many U.S. government personnel have reported sustaining unexplained and debilitating neurological injuries while working abroad; Mike Baker investigates if these invisible, mind-altering attacks are evidence of active mind-control programs worldwide.

Many U.S. government personnel have reported sustaining unexplained and debilitating neurological injuries while working abroad; Mike Baker investigates if these invisible, mind-altering attacks are evidence of active mind-control programs worldwide.

Presidential Emergency Action Documents have the potential to grant the U.S. president unlimited authority; Mike Baker investigates how these files are among the most secretive documents in U.S. government and what might trigger their use.

When astronomers discover a rogue black hole speeding through the Milky Way, they investigate how much danger this cosmic monster poses to Earth, and what would happen if it ever entered our solar system.

When astronomers discover a rogue black hole speeding through the Milky Way, they investigate how much danger this cosmic monster poses to Earth, and what would happen if it ever entered our solar system.

Black holes are not the violent monsters people think they are, and new discoveries reveal that they might have been essential to creating stars, giving light, and building the universe itself.

Black holes are not the violent monsters people think they are, and new discoveries reveal that they might have been essential to creating stars, giving light, and building the universe itself.

Nebulas are the strange structures of cosmic gas and dust where stars are born and die, and new discoveries reveal the secrets of these mysterious places.

Exploring new discoveries that rewrite the history of the solar system, revealing a complex and violent story that begins with the birth of the sun from the debris of a massive galactic collision to its eventual fate as a lone zombie star.

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.

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 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.

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

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.

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.

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.

A village mourner at an Indonesian funeral films a dead man's hand waving through the glass window of a coffin; experts investigate and uncover powerful local priests and the practice of black magic rituals to reanimate corpses back from the dead.

A village mourner at an Indonesian funeral films a dead man's hand waving through the glass window of a coffin; experts investigate and uncover powerful local priests and the practice of black magic rituals to reanimate corpses back from the dead.

A security camera captures panic in Lima, Peru, as a wave of fire chases terrified citizens down a city street claiming 30 lives; experts uncover reports of a disastrous fuel tanker accident with an inadequate and fatal safety response.

Security cameras capture a baby stroller pushed by a mysterious force across a London subway platform and crash onto the tracks; experts investigate and uncover a disturbing history of paranormal incidents surrounding London's subway system.

Two young men capture a ghostly figure that begins chasing them on a deserted road in the mountains of Jordan; experts investigate and uncover local tales of black magic practitioners and demonic entities with supernatural powers.

A young woman captures a doll that mysteriously comes to life inside a closet as she housesits alone in Dallas; experts investigate and reveal terrifying accounts of haunted dolls possessed by demonic souls.

Security cameras capture a baby stroller pushed by a mysterious force across a London subway platform and crash onto the tracks; experts investigate and uncover a disturbing history of paranormal incidents surrounding London's subway system.

Two young men capture a ghostly figure that begins chasing them on a deserted road in the mountains of Jordan; experts investigate and uncover local tales of black magic practitioners and demonic entities with supernatural powers.

A young woman captures a doll that mysteriously comes to life inside a closet as she housesits alone in Dallas; experts investigate and reveal terrifying accounts of haunted dolls possessed by demonic souls.

A security camera captures panic in Lima, Peru, as a wave of fire chases terrified citizens down a city street claiming 30 lives; experts uncover reports of a disastrous fuel tanker accident with an inadequate and fatal safety response.

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.

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.

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.

An image of a pilot donning a Red Eagles patch is captured by photographers during a mysterious fighter jet training exercise; Mike Baker investigates if the U.S. Air Force has revived a black file squadron.

An image of a pilot donning a Red Eagles patch is captured by photographers during a mysterious fighter jet training exercise; Mike Baker investigates if the U.S. Air Force has revived a black file squadron.

In the aftermath of the 9/11 attacks, a series of secret meetings were reported between US military brass and Hollywood filmmakers.

Experts investigate if a nearby exoplanet could be the home to an alien civilization of strange, metallic monsters, after a new discovery confirms that life can thrive on such a strange world.

Experts investigate if a nearby exoplanet could be the home to an alien civilization of strange, metallic monsters, after a new discovery confirms that life can thrive on such a strange world.

Discoveries about interstellar space, the space between the universe's stars, reveal that it's not empty and unremarkable as previously thought, but filled with weird objects and strange phenomena that might hold the darkest secrets of the cosmos.

Discoveries about interstellar space, the space between the universe's stars, reveal that it's not empty and unremarkable as previously thought, but filled with weird objects and strange phenomena that might hold the darkest secrets of the cosmos.

New discoveries cause astronomers to question if the Big Bang really happened; using the latest science, they investigate if it wasn't just the start of the universe but many mysterious multiverses.

Rome's Colosseum is the most famous stadium on the planet, and it took cutting-edge engineering and a fallen emperor to build it; experts use the latest tech and modern-day science to reveal if building it a second time would be just as difficult.

Rome's Colosseum is the most famous stadium on the planet, and it took cutting-edge engineering and a fallen emperor to build it; experts use the latest tech and modern-day science to reveal if building it a second time would be just as difficult.

New York's Brooklyn Bridge might be the most important bridge in the world, and it took dangerous, cutting-edge engineering to built it; experts use the latest tech and modern-day science to reveal if building it a second time would be as deadly.

Rome's aqueducts are one of the greatest engineering marvels in history, and it took dangerous, cutting-edge construction to build them; experts use the latest tech and modern-day science to reveal if building them a second time would be as deadly.

According to the Bible, Noah's Ark was a world-changing engineering feat, and it took cutting-edge construction to build it; experts use the latest tech and modern-day science to reveal if building it a second time would be just as difficult.

Rome's Pantheon hides the secret to the Roman Empire's power, and it took dangerous, cutting-edge engineering to build it. Experts use the latest tech and modern-day science to reveal if building it a second time would be just as deadly.

The Great Wall of China is one of the world's greatest engineering marvels, and it took dangerous, cutting-edge construction to build it; experts use the latest tech and modern-day science to reveal if building it a second time would be as deadly.

As floodwaters unleash havoc in Venice, Italy, experts use the latest technology and modern-day science to explore the feasibility of rebuilding it.

In Scotland, a distinguished library is ravaged by not one but two disastrous fires; experts explore how outdated construction methods and materials contributed to the vulnerability of this esteemed place of learning.

In Scotland, a distinguished library is ravaged by not one but two disastrous fires; experts explore how outdated construction methods and materials contributed to the vulnerability of this esteemed place of learning.

A deadly explosion strikes a major crude oil port creating an inferno of epic proportions in Corpus Christi, Texas; experts use the latest science to investigate and uncover a failed dredging operation that ruptured a propane pipeline.

Catastrophe strikes Miami, Fla., as a 13-story condominium tower collapses with deadly debris; experts use the latest science to investigate and uncover an uncontrolled method of demolition that led to catastrophic failure.

An aging dam in Nebraska is overcome by flooding after the area is hit with a devastating bomb cyclone; an investigation reveals that massive chunks of ice unleashed by the superstorm played a critical role in the failure of the old structure.

On a snowy morning in Pittsburgh, a messy commute becomes dangerous after a bridge collapses; an investigation reveals how corrosion and other environmental factors helped bring down this decades-old structure.

A vital Mississippi River interstate crossing is discovered to be in danger of imminent collapse in Memphis; experts use the latest science to investigate and uncover severely compromised load-bearing tension members with a life-threatening weakness.

An aging dam in Nebraska is overcome by flooding after the area is hit with a devastating bomb cyclone; an investigation reveals that massive chunks of ice unleashed by the superstorm played a critical role in the failure of the old structure.

On a snowy morning in Pittsburgh, a messy commute becomes dangerous after a bridge collapses; an investigation reveals how corrosion and other environmental factors helped bring down this decades-old structure.

A vital Mississippi River interstate crossing is discovered to be in danger of imminent collapse in Memphis; experts use the latest science to investigate and uncover severely compromised load-bearing tension members with a life-threatening weakness.

Catastrophe strikes Miami, Fla., as a 13-story condominium tower collapses with deadly debris; experts use the latest science to investigate and uncover an uncontrolled method of demolition that led to catastrophic failure.

The Great Wall of China is one of the world's greatest engineering marvels, and it took dangerous, cutting-edge construction to build it; experts use the latest tech and modern-day science to reveal if building it a second time would be as deadly.

The Great Wall of China is one of the world's greatest engineering marvels, and it took dangerous, cutting-edge construction to build it; experts use the latest tech and modern-day science to reveal if building it a second time would be as deadly.

As floodwaters unleash havoc in Venice, Italy, experts use the latest technology and modern-day science to explore the feasibility of rebuilding it.

Former CIA operative Mike Baker investigates top-secret government programs steeped in cutting-edge science; Mike speaks with experts, government officials and scientists to go deeper into the black files than ever before.

Former CIA operative Mike Baker investigates top-secret government programs steeped in cutting-edge science; Mike speaks with experts, government officials and scientists to go deeper into the black files than ever before.

Unidentified black triangles have been reported in flight over top-secret military bases for decades, and now, Mike Baker investigates if the US government is involved in developing experimental aircraft, or if this could be something otherworldly.

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 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.

Dark matter and dark energy are locked in an epic battle for control of the cosmos, and the winner will determine the fate of the universe; new discoveries might reveal which force will emerge victorious.

Dark matter and dark energy are locked in an epic battle for control of the cosmos, and the winner will determine the fate of the universe; new discoveries might reveal which force will emerge victorious.

For twenty years, NASA's Cassini spacecraft revealed the strange secrets of Saturn until it vaporized in its atmosphere in a blaze of glory; but today its legacy lives on, as fresh data from the probe helps scientists make brand-new discoveries.

A mass grave of mutilated skeletons is unearthed at the frontier of the Roman Empire, experts use advanced digital analysis to reveal the mystery behind these grisly remains.

A mass grave of mutilated skeletons is unearthed at the frontier of the Roman Empire, experts use advanced digital analysis to reveal the mystery behind these grisly remains.

A temple to the Roman god of the underworld is the site of ritual sacrifice and a gate to the underworld, but it was buried because it was believed to be cursed; experts use cutting-edge forensics to reveal what actually happened here.

Archaeologists make a shocking discovery when the perfectly preserved remains of three children are unearthed from the frozen mountains of Argentina; experts investigate the bizarre circumstances behind this grisly scene.

An archaeological excavation uncovers ancient human carnage; experts use 3D modeling to reveal what may be the first major war in human history.

Archeologists make a bone-chilling discovery when they unearth 20 mutilated skeletons in Mexico; investigators use advanced forensic analysis to examine the bizarre burial and reveal an ancient case of Mayan mass murder.

In an abandoned Maya city, an archaeologist discovers the tomb of a mysterious red skeleton decorated in jade and pearl treasures; experts use cutting-edge tech to reveal who this person was and why they were buried so.

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 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.

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.

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 led Egypt through a sixty-year golden age as a powerful pharaoh; despite his recorded achievements, researchers investigate lingering mysteries regarding his wife Nefertari and his death.

Explorers investigate the snow-covered Ararat Mountains for remains of Noah's Ark; two separate expeditions claim discoveries in different areas, fueling debates over the truth of the story.

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.

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.

Explorers investigate the snow-covered Ararat Mountains for remains of Noah's Ark; two separate expeditions claim discoveries in different areas, fueling debates over the truth of the story.

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.

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.

Rameses II led Egypt through a sixty-year golden age as a powerful pharaoh; despite his recorded achievements, researchers investigate lingering mysteries regarding his wife Nefertari and his death.

In an abandoned Maya city, an archaeologist discovers the tomb of a mysterious red skeleton decorated in jade and pearl treasures; experts use cutting-edge tech to reveal who this person was and why they were buried so.

In an abandoned Maya city, an archaeologist discovers the tomb of a mysterious red skeleton decorated in jade and pearl treasures; experts use cutting-edge tech to reveal who this person was and why they were buried so.

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.

Testing the hijinks from the "Indiana Jones" franchise.

Adam and Jamie put the pedal to the metal and set out to test two tall tales from the street racing world; they investigate whether oversteering increases agility and if reverse parking is still possible using the drifting technique.

Jamie and Adam investigate a grenade blast; will consuming diet soda and Mentos rupture a person;s stomach?

The latest discoveries suggest life beyond this planet; scientists investigate if earth's life began elsewhere in the universe, and whether humans need to evolve to know for sure.

New discoveries have revealed thousands of exoplanets beyond the solar system, and some resemble earth enough that one could be a new home for humanity; with cutting-edge technology, finding the perfect one is the scientific challenge of the age.

Subterranean military fortresses situated on the southern coast of Ireland have protected against enemy invasion for over 400 years, and now, experts investigate how this powerful stronghold transformed into a brutal and terrifying prison.

The longest known cave system in the world spans hundreds of miles beneath the hills of Kentucky, and containing prehistoric artifacts and ancient human remains, experts reveal a subterranean mystery that may have changed the course of U.S. history.

Deep beneath the streets of Cincinnati lies a network of deserted tunnels and caverns that contain a remarkable history of the city's origins, and now, experts investigate to reveal who built this underground labyrinth and why it was abandoned.

A forgotten world of ancient underground passages and medieval engineering lies hidden beneath the town of Exeter, England; experts investigate and reveal how this ambitious tunnel system was the result of one of the deadliest epidemics in history.

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.

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.

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 a mysterious fortification concealed beneath a patch of woodland in the remote stretches of Norfolk, England; experts investigate rival royal families and a lost castle that was destroyed during a medieval blood feud.

Satellite images capture a large compound of abandoned structures that are overgrown with vegetation in Indiana; experts investigate and uncover a derelict WWII munitions factory that played a crucial role in US military history.

Aerial drone imaging captures a circular man-made structure that appears to be centuries-old in the remote forests of Aydin, Turkey; experts investigate a lost ancient amphitheater with a history steeped in gladiatorial bloodshed.

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.

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 drone imaging captures a circular man-made structure that appears to be centuries-old in the remote forests of Aydin, Turkey; experts investigate a lost ancient amphitheater with a history steeped in gladiatorial bloodshed.

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.

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.

Satellite images capture a large compound of abandoned structures that are overgrown with vegetation in Indiana; experts investigate and uncover a derelict WWII munitions factory that played a crucial role in US military history.

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.

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.

Adam and Jamie investigate the ability of hit men to take down a target.

Adam and Jamie, along with Al Jean, the executive producer of "The Simpsons," test occurrences from the show.

The team tests Superhero gadgets including the grappling hook, the phantom ring punch and the phone booth change.

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.

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.

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.

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

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.

Using a long-lost treasure map purporting to show the whereabouts of a missing ship buried with gold and silver in the California desert, a team of experts use the new evidence to get closer to a game-changing discovery.

Long-lost maps offer fresh clues in the hunt for the Ark of the Covenant; using the latest archaeological methods, experts retrace through steps through the Holy Land, Egypt and Ethiopia to make a game-changing discovery.

Meriwether Lewis was the man who teamed with William Clark to map the lands west of the Mississippi, but he died in mysterious circumstances; experts reveal a vast conspiracy that could prove that one of America's greatest explorers was murdered.

New evidence suggests the Knights Templar fled Europe and rebuilt their warrior order in the Americas a century before Christopher Columbus; experts use technology to investigate long-lost relics to see if they confirm this game-changing theory.

New discoveries at the site of an alleged long-lost gold mine could lead investigators to a $200 million payday; experts use cutting-edge tech to investigate clues in long-lost maps and relics to recover the Lost Dutchman's treasure.

New evidence from one of the world's oldest maps offers clues to a long-lost civilization of untold treasure, and this cutting-edge expedition might finally prove that this mysterious kingdom is the ancestral home of the ancient Egyptians.

The legend of the Fountain of Youth might finally be explained by hidden messages encoded in a 500-year-old map, and using cutting-edge archaeological methods, experts explore forgotten caves and perilous waters to reveal long-lost secrets.

New evidence suggests the Mayan empire may have reestablished themselves in America; using high-tech mapping systems, Justin and Emiliano scan the Florida landscape as they search for ancient canoes and flat-topped pyramids.

New evidence from one of the world's oldest maps offers clues to a long-lost civilization of untold treasure, and this cutting-edge expedition might finally prove that this mysterious kingdom is the ancestral home of the ancient Egyptians.

The legend of the Fountain of Youth might finally be explained by hidden messages encoded in a 500-year-old map, and using cutting-edge archaeological methods, experts explore forgotten caves and perilous waters to reveal long-lost secrets.

New evidence suggests the Mayan empire may have reestablished themselves in America; using high-tech mapping systems, Justin and Emiliano scan the Florida landscape as they search for ancient canoes and flat-topped pyramids.

New discoveries at the site of an alleged long-lost gold mine could lead investigators to a $200 million payday; experts use cutting-edge tech to investigate clues in long-lost maps and relics to recover the Lost Dutchman's treasure.

Using a long-lost treasure map purporting to show the whereabouts of a missing ship buried with gold and silver in the California desert, a team of experts use the new evidence to get closer to a game-changing discovery.