A ghostly figure is caught on tape stalking people in Japan, providing evidence for the truth of a local legend; a mysterious flame appears in the Norwegian wilderness with the fury of the Viking god, Thor.

Near Area 51, a police convoy is filmed transporting an alien-looking craft in the dead of night; when strange beams of light are reported in Argentina, experts investigate if it's proof of a terrifying Nazi superweapon.

When a river of blood washes through a city's streets, some witnesses believe it's a warning of doomsday; a strange, perfect circle emerges in the clouds about California, with some experts speculating that it's evidence of alien activity.

A ghostly figure is caught on tape stalking people in Japan, providing evidence for the truth of a local legend; a mysterious flame appears in the Norwegian wilderness with the fury of the Viking god, Thor.

An explorer searching for treasure at a Mayan sacrificial site is attacked by a mysterious underwater fog; thousands of fish spontaneously jump to their deaths; something alien appears over the skies of Los Angeles.

A minuscule metal sphere containing two microscopic holes could be the smallest murder weapon in history; experts explore how this tiny object is linked to one of the most bizarre true crime cases of the 20th century.

Investigating whether a gold death mask is the face of a king who fought in the Trojan Wars; three ancient chalk carvings could be the secret to constructing Stonehenge; how a printing plate from the UK Treasury ended up in an Austrian lake.

Glimpsing into the internet's most chaotic crevices; monster trucks on two wheels; tile smashing robots; massive slime bubbles.

Counting down the top internet legends; these are the smartest and bravest people using science to take their skills to the next level; learning how to pull a wheelie in a boat, take inline skates off road and shoot an arrow around a corner.

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.

Neutrinos are the most mysterious particles in the universe, and they power some of the most explosive events in the cosmos; new discoveries reveal how these ghosts pass through objects undetected and why they could be the reason humans exist.

The hidden kingdom of microscopic alien organisms shapes the universe as much as galaxies, stars, and planets; new discoveries reveal how bacteria, viruses and other micro-organisms built life on Earth and influence humanity's future in the cosmos.

When sea levels rise, storm surge barriers work overtime to fight floods; it takes a team of experts to maintain these engineering marvels to prevent catastrophe and keep millions of people safe.

A dedicated crew of mariners race time as they dredge North America's busiest shipping canal to allow safe passage for huge oil tankers; specialists repair years of corrosion and damage to get a massive ferry operating safely.

Technicians battle staggering heights and fierce winds to upgrade a communications tower that keeps millions connected; special access to this dangerous job site reveals what it takes to get the job done.

Maintenance crews at a remote airstrip are exposed to the elements as they keep water-bombing aircraft flying to battle forest fires; mechanics race against the clock to get transport helicopters to safely shuttle oil rig workers.

Working thousands of feet above the California desert, engineers and crews perform perilous high-wire acts to keep a hi-tech tramway system operating safely for the hundreds of daily tourists it transports.

When the world's oldest roller coaster breaks at the worst possible moment, skilled engineers and technicians race against the clock to investigate what went wrong and how to fix it before it's opened to the public.

A determined team of expert technicians battle nature's destructive forces to keep one of the world's longest road bridges open in deadly conditions.

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.

A devastating earthquake wreaks havoc on an iconic San Francisco bridge and leaves drivers fearing for their lives; experts use the latest science to investigate and uncover a weakened expansion joint caused by catastrophic shockwaves.

The construction of a new parking garage at a luxury waterside condo turns disastrous as it collapses in Jacksonville, Fla.; experts use the latest tech to investigate and uncover critical design flaws and unsupported lower levels.

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.

New York residents get a rude awakening when a disastrous crane collapse causes chaos on the downtown streets of Manhattan; experts use the latest tech to investigate and reveal how a slight increase in wind conditions created major catastrophe.

The construction of a new parking garage at a luxury waterside condo turns disastrous as it collapses in Jacksonville, Fla.; experts use the latest tech to investigate and uncover critical design flaws and unsupported lower levels.

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.

New York residents get a rude awakening when a disastrous crane collapse causes chaos on the downtown streets of Manhattan; experts use the latest tech to investigate and reveal how a slight increase in wind conditions created major catastrophe.

A devastating earthquake wreaks havoc on an iconic San Francisco bridge and leaves drivers fearing for their lives; experts use the latest science to investigate and uncover a weakened expansion joint caused by catastrophic shockwaves.

When the world's oldest roller coaster breaks at the worst possible moment, skilled engineers and technicians race against the clock to investigate what went wrong and how to fix it before it's opened to the public.

A determined team of expert technicians battle nature's destructive forces to keep one of the world's longest road bridges open in deadly conditions.

We reveal how to bend fire, turn a vacuum cleaner into a didgeridoo and become the world's fastest talker!

We're counting down the biggest over achievers on the web, individuals whose dedication make them the best of the best. We'll learn how to bungee jump while playing the bagpipes, use a robot to shoot hoops, and drive vertically up a cliff face.

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.

A brand-new NASA mission to the sun reveals cutting-edge discoveries about Earth's star; as the Parker Solar Probe dives through the sun's atmosphere, its findings challenge everything known about this strange place.

The galaxy is full of stars ready to explode into supernovas, a stellar detonation powerful enough to destroy all life on Earth; it's an event that hasn't occurred in 400 years, and the search is on to locate which star may be next.

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?

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.

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.

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.

The world's abandoned structures hold new evidence about the lives and deeds of history's greatest heroes and villains and using the latest discoveries at these mysterious sites, experts count down the 10 most significant ones.

A strange sea fortress that guards icy waters is home to a grim secret; experts investigate the mysteries at this eerie structure, which fought an invisible enemy far more deadly than ever imagined.

An enormous concrete box with bizarre circular openings looms on the coast of an island near mainland China; experts investigate and uncover tunnels leading to an enormous underground complex that nearly triggered a nuclear war.

A war-torn Italian ghost town immortalized by a legendary Hollywood director blurs the lines between fiction and reality; experts investigate and uncover a forgotten landscape of ruins captured in a WWII documentary.

The ruins of a dreamlike Polish palace hide an astonishingly dark history that's shrouded in mystery to this day; experts investigate and uncover an ornate gothic structure that concealed a nightmare of Nazi experimentation.

An enormous concrete box with bizarre circular openings looms on the coast of an island near mainland China; experts investigate and uncover tunnels leading to an enormous underground complex that nearly triggered a nuclear war.

A war-torn Italian ghost town immortalized by a legendary Hollywood director blurs the lines between fiction and reality; experts investigate and uncover a forgotten landscape of ruins captured in a WWII documentary.

The ruins of a dreamlike Polish palace hide an astonishingly dark history that's shrouded in mystery to this day; experts investigate and uncover an ornate gothic structure that concealed a nightmare of Nazi experimentation.

A strange sea fortress that guards icy waters is home to a grim secret; experts investigate the mysteries at this eerie structure, which fought an invisible enemy far more deadly than ever imagined.

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.

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.

The smartest and bravest people use science to take their skills to the next level, from designing a robotic drawing arm to making a bike that exercises the whole body.

Investigating if nature truly knows best; the world's first driving dog; a bright blue tarantula; the world's smallest horse.

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

Gravitational waves are helping scientists explore the cosmos in revolutionary, new ways, and the discoveries they make are revealing the universe's greatest mysteries.

The Rosetta mission is a groundbreaking expedition to land on a comet for the very first time; special access reveals what this cutting-edge journey discovers and how these mysterious objects help create life on Earth.

Investigating whether alchemists such as Nostradamus, Nicolas Flamel and John Dee could truly perform miracles, or were in actuality just clever deceivers.

Investigating if the High Priests of the Temple in Jerusalem hid sacred items from the Romans, and if the Dead Sea Scrolls can reveal the location of hidden wonders.

Legend has it that the Knights Templar discovered a great treasure in Jerusalem and may have brought it back to England.

Many ancient cultures allude to the existence of giants; tombs and skeletons of the alleged beings are discovered in Sardinia.

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.

A satellite finds a set of large arrows in the badlands of the American west; a blood red waterfall stains Antarctica's snows; a plague of massive holes in the Siberian landscape.

The face of Christ is discovered in a field in Hungary; a photo that claims to show who shot down a passenger jet in Ukraine; a sinister shape in the mountains of Afghanistan that leads investigators to a hidden genocide.

Satellites locates strange spiral markings in the remote African desert; a weird deadly black blob is threatening the Florida Keys; something large is found deep beneath the ice of Antarctica.

Satellites find American stealth technology deep inside China; an unidentified cloud swamps America's skies; something very large is lurking beneath Loch Ness.

Desperate signs from lost veterans in Vietnam; a fleet of large ships stranded in the middle of a vast desert; strange walls stretching vast distances across Northern California.

A strange structure is discoverd in Mongolia; bizarre rings in Spain could lead to the lost city of Atlantis; a large floating island is on a collision course with New Zealand.

Satellites find American stealth technology deep inside China; an unidentified cloud swamps America's skies; something very large is lurking beneath Loch Ness.

Desperate signs from lost veterans in Vietnam; a fleet of large ships stranded in the middle of a vast desert; strange walls stretching vast distances across Northern California.

A strange structure is discoverd in Mongolia; bizarre rings in Spain could lead to the lost city of Atlantis; a large floating island is on a collision course with New Zealand.

Satellites locates strange spiral markings in the remote African desert; a weird deadly black blob is threatening the Florida Keys; something large is found deep beneath the ice of Antarctica.

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.

In a special tournament, Battlebots Team USA takes on bots from around the world in an international showdown of combat robotics.

Minotaur goes head to head with Subzero in an ultimate smackdown as the two bots try to secure their spots in the World Championship.

Brutus, Warhawk and End Game fight for a guaranteed spot, as the last round of bots put everything on the line to make it into the Sweet 16 round.

As shipwrecks of World War II continue to erode in the sea, their toxic cargoes continue to pose a catastrophic threat; now, experts use cutting-edge tech to investigate and reveal the potential impact of these noxious underwater dangers.

For over a century, the stories and wrecks of HMS Hampshire and HMS Vanguard continue to be shrouded in mystery; two research teams are granted special access to investigate and uncover what happened to these WWI warships in their final moments.

The wreckages of three German U-boats are eroding at the bottom of the sea along with the stories behind their disastrous fate; now, a team of maritime archaeologists race to locate the submarines and solve the mystery behind their deadly demise.

The aerial bombardment of the Japanese fleet and the torpedo strike of the Wilhelm Gustloff are two of the most shocking attacks of WWII; expert divers explore these underwater graveyards for new evidence of these maritime conflicts.

The remains of five warships could reveal new insights into how the nuclear arms race changed the world forever; using 3-D sonar scan technology, an expert team of marine scientists investigate the catastrophic effects of atomic explosions at sea.

More than 50 massive warships were lost in a matter of hours in the Scottish natural harbor of Scapa Flow during World War I; now, marine archaeologists use cutting-edge technology to explore one of the greatest acts of defiance in wartime history.

The USS Arizona and the HMS Hood were two of the most powerful warships in history, but their weaknesses paid a fatal price; experts investigate evidence that may reveal why the age of the battleship has come to a sudden and violent end.

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.

As the Nazis plot the beginning of their empire, Heinrich Himmler transforms the ruins of a German castle into a mysterious Nazi complex.

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.

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

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.

A labyrinth of tunnels carved deep in the Polish mountains leads to the largest underground Nazi weapons development complex ever discovered.

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

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 labyrinth of tunnels carved deep in the Polish mountains leads to the largest underground Nazi weapons development complex ever discovered.

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

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.

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.

As the Nazis plot the beginning of their empire, Heinrich Himmler transforms the ruins of a German castle into a mysterious Nazi complex.

The Sweet 16 round kicks off with fights featuring Tombstone, Minotaur and Lock-Jaw, as the elite bots begin the battle to become the 2018 BattleBots World Champion.

The tournament begins with an epic night of smackdowns and legendary upsets as eight world-class bots go head to head to earn a place in the final four of the BattleBots World Championship.

Championship night arrives and just four bots remain to face off in the ultimate battles to decide the 2018 BattleBots World Champion.

More everyday items are put under the microscope while discovering how sawhorses and toolboxes, sorbet pops and school buses are made.

More everyday items are put under the microscope; discovering how sanders, solid terrain models, stucco and high-speed roll up doors are made.

Pressed glass; pickup truck caps; alpaca yarn; utility knives.

More everyday items are put under the microscope to discover how life casts, downdraft cooktops, compression hosiery and electric motorcycles are made.

How traffic signal poles, coffee filters and chainsaw mining machines are made.

Time delay locks; brownies; pallet dispensers.

Bead wire; mini pepperoni; irrigation sprinklers.

Mouth-blown window glass; water pumps; sake.

How speed skates, synthetic rubber, cocoa beans and bulk chocolate are made.

Custom steering wheels; apple pie; domestic radiators; paper towels.

Whips; automated pizza makers; incense cones; scale turbine engines.

Heather gems; instant film; beet sugar; electric roadsters.

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 ancient city of Abydos contains some of the oldest Egyptian tombs and a buried temple linked to a mysterious death cult; now, archaeologists use cutting-edge drone imaging to investigate long-hidden secrets behind the first pharaohs.

A colossal stone temple on a remote Egyptian island mysteriously bears the names of the most famous leaders of the ancient world; now, experts use cutting-edge tech to investigate why pharaohs and emperors all built monuments at this enigmatic site.

The clifftop ruins of Tintagel Castle are shrouded in a tumultuous history and believed to be the birthplace of King Arthur; experts use cutting-edge tech to unlock the secrets of this ancient structure and reveal the truth behind a legendary ruler.

The legendary metropolis of Xanadu and its fabled existence have mystified experts for centuries; archaeologists use cutting-edge aerial imaging to investigate new discoveries and reveal the truth behind this mythical lost city.

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.

Cutting-edge archaeological methods help experts unearth the dark secrets hidden at the seven wonders of ancient Rome.

The sacred city of Nippur and the world's only ziggurat contain elusive mysteries to the ancient Sumerian people; now, archaeologists armed with pioneering tech are on a quest to reveal the secrets behind the earliest known civilization in history.

Cutting-edge archaeological methods help experts unearth the dark secrets hidden at the seven wonders of ancient Rome.

The sacred city of Nippur and the world's only ziggurat contain elusive mysteries to the ancient Sumerian people; now, archaeologists armed with pioneering tech are on a quest to reveal the secrets behind the earliest known civilization in history.

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.

The ancient city of Abydos contains some of the oldest Egyptian tombs and a buried temple linked to a mysterious death cult; now, archaeologists use cutting-edge drone imaging to investigate long-hidden secrets behind the first pharaohs.

A colossal stone temple on a remote Egyptian island mysteriously bears the names of the most famous leaders of the ancient world; now, experts use cutting-edge tech to investigate why pharaohs and emperors all built monuments at this enigmatic site.

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.

Astronauts evacuate when a mystery object hurtles toward the ISS; a NASA secret agent goes undercover to retrieve missing moon rocks; scientists struggle to find answers when they discover a huge void at the edge of the solar system.

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

Discoveries of new planets have revealed countless worlds much stranger than Earth; some of these strange worlds don't have stars and others are made out of diamonds.

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.

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.

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.

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.

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

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.

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 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 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 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 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 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 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.

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.

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.

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.

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.

Scientists have discovered a mysterious ninth planet ten times the size of Earth on the very edge of the solar system; this strange world could have moons with extraterrestrial life.

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.

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

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.

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

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

A Navy seaman experiences strange events in the heart of the Bermuda Triangle; an Air Force Staff Sergeant is confronted by an otherworldly being in Iraq; a tech sergeant discovers a haunting visitor in her air base house.

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

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

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.

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

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 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 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.

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.

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.

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.

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

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

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.

Soviet photos of the moon are intercepted by the CIA; a malfunction aboard the ISS, which imperils the whole crew; NASA probe finds evidence of the possibility of life on Mars.

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

The universe is a dangerous place; exploring the deadliest spots in the cosmos; between earth and the edge of the universe, there are a million ways to die; a crash test dummy is on a mission.

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.

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.

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.

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.

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.

Egypt's Great Pyramid is one of the world's greatest and most mysterious marvels, and using cutting-edge tech and the latest engineering innovations, experts reveal what it would take to build the ancient wonder today.

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

Bridges and tunnels revolutionized transportation-but when they fail, tragedy follows. This episode explores the world's worst collapses and fires, including a tunnel blaze in the Alps so intense it fused 20 cars together. While bridge failures send vehicles plummeting into water or ground below, tunnel fires turn confined spaces into infernos. Why do these disasters happen, and what can be done to stop them? As we build bigger and faster, we also raise the stakes.

As technology advances, manmade accidents have become as destructive as some natural disasters; a look at recent catastrophes.

Tornadoes are violent, rotating columns of air that can level buildings, their unpredictability makes them even more destructive; a look at how tornadoes form and if they can be stopped.

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.

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.

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

Archive footage and cutting-edge CGI is used to explore global disasters, illustrating the full toll these events can take and giving an understanding on how and why they occur.

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.

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

Archive footage and cutting-edge CGI is used to explore global disasters, illustrating the full toll these events can take and giving an understanding on how and why they occur.

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.

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

Bridges and tunnels revolutionized transportation-but when they fail, tragedy follows. This episode explores the world's worst collapses and fires, including a tunnel blaze in the Alps so intense it fused 20 cars together. While bridge failures send vehicles plummeting into water or ground below, tunnel fires turn confined spaces into infernos. Why do these disasters happen, and what can be done to stop them? As we build bigger and faster, we also raise the stakes.

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

Cosmonauts are trapped in a capsule in a frozen lake; a NASA scientist investigates the Hindenburg; the full moon affects experiments.

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

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.

The first close-up images of Pluto reveal secrets; scientists investigate if Pluto is home to a warm ocean of liquid water beneath its surface and whether this underground ocean could harbor life.

A nuclear submarine goes missing while spying on Soviet maneuvers, and its wreckage is found on the ocean floor.

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.

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.

Adolph Hitler disappears from the world in an apparent suicide at the end of World War II, but theories of his possible escape continue to circulate; experts use forensic science to examine remains that could finally solve the mystery of his fate.

The Shroud of Turin is alleged to be the burial cloth of Jesus Christ; forensic analysis is used to determine the truth.

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.

The ruins of an abandoned prison are evidence of a chaotic riot that put the prisoners in charge; special access to its burnt-out interior reveals how inmates took over Ireland's Alcatraz and why it is deserted today.

Tunnels filled with human bones lie beneath the streets of Paris, and this horrifying engineering marvel points to a dark secret; new discoveries reveal why this grisly underground death maze was built and why it was abandoned.

Near the destroyed city of Pompeii, an eerie complex of underground tunnels snakes beneath a volcano, and some believe these passages were intended as a gateway to hell; new discoveries reveal exactly why they were built and why they were abandoned.

A strange complex of tunnels on the grounds of a mansion are under lock and key for a century; since its rediscovery, some believe its mysterious place is a gate to hell; new discoveries reveal its secret purpose and why it was abandoned.

On a strange island off the coast of Croatia, the mysterious ruins of a long-abandoned hideout look like they once belonged to a James Bond super-villain, and new discoveries reveal why it was built and why they were abandoned.

The ruins of a once-palatial compound contain the secrets of one of history's most notorious criminals, and new discoveries reveal why this high-security estate was built and why it was abandoned.

A ghost town in the American West was once a Gold Rush hotspot and one of the most violent places in America; today, there are legends of a secret treasure buried in the surrounding hills, and new discoveries might finally reveal its true location.

On a strange island off the coast of Croatia, the mysterious ruins of a long-abandoned hideout look like they once belonged to a James Bond super-villain, and new discoveries reveal why it was built and why they were abandoned.

The ruins of a once-palatial compound contain the secrets of one of history's most notorious criminals, and new discoveries reveal why this high-security estate was built and why it was abandoned.

A ghost town in the American West was once a Gold Rush hotspot and one of the most violent places in America; today, there are legends of a secret treasure buried in the surrounding hills, and new discoveries might finally reveal its true location.

A strange complex of tunnels on the grounds of a mansion are under lock and key for a century; since its rediscovery, some believe its mysterious place is a gate to hell; new discoveries reveal its secret purpose and why it was abandoned.

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.

The ruins of an abandoned prison are evidence of a chaotic riot that put the prisoners in charge; special access to its burnt-out interior reveals how inmates took over Ireland's Alcatraz and why it is deserted today.

When a Chinese moon rover breaks down, a scientist at NASA points to a mysterious material that seemed to sabotage the Apollo missions decades earlier; the Rosetta spacecraft discovers a comet that appears to be singing.

The discovery of geysers on a moon; NASA's mission to detect life; an object is spotted approaching an asteroid.

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

From the Pyramids to the Parthenon and Big Ben in London, "Unearthed" helps answer questions and crack unsolved mysteries surrounding some of the greatest wonders of the ancient and modern world. CGI animation and other state-of-the-art technology breaks down how the iconic structures and monuments were designed, built, used and, in some cases, lost and rediscovered. The series attempts to show that the future of science is key to understanding the past, providing links to unravel some of the world's greatest mysteries.

The legendary city of Kish, Iraq, lies at the cradle of human civilization and home to some of the world's first kings; using cutting-edge tech, experts investigate the buried secrets of this lost city to uncover the first origins of royalty.

Nearly a decade after the ancient site of Nimrud was destroyed by terrorists, experts return to salvage the wreckage; archaeologists piece together the remaining ruins to reveal the origins and brutal decline of a lost empire.

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 Red Pyramid at Dahshur is a revolutionary megastructure and the first true pyramid ever constructed in ancient Egypt; experts investigate to reveal the pharaoh who built it and the mystery behind it's trailblazing design.

The ancient necropolis of Abusir contains strange megastructures unlike any discovered in Egypt; experts gain rare access to investigate lost tombs and forgotten rituals to reveal the secrets of Egypt's Sun Cult pharaohs.

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

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.

Satellite evidence of a strange building on a mysterious island owned by Jeffrey Epstein points to something sinister; experts use cutting-edge technology to investigate why it was built and what goes on here.