Transylvanian fortress; medieval stronghold; ruins atop a peninsula.

At the sacrificial alter El Castillo, where thousands met their death, researchers find new evidence that could shed light on the Maya; a sacred well at Chichen Itza where thousands were deposited and ceramic pieces at Khonkho Wankane mortuary.

At an off-grid site, Jordyn and Johnny, equipped with cameras, seek local insights into hauntings; they then cut electricity to look for fabled spirits or new phenomena.

At an off-grid site, Jordyn and Johnny, equipped with cameras, seek local insights into hauntings; they then cut electricity to look for fabled spirits or new phenomena.

Two of the deadliest.

Speed is a major competitive strategy; while humans measure and focus on how to achieve it in greater quantities, Earth's creatures have adapted and evolved over long periods to achieve acceleration.

A look at great thinkers who have left their mark on scientific discovery.

Transylvanian fortress; medieval stronghold; ruins atop a peninsula.

A look at the fastest machines on Earth; they are thrilling with their horsepower, strength and bone-rattling speed, but for these speed demons to be the fastest and most powerful, they need to be truly colossal.

Amy's father, Dan, escaped the Vietnam War when he was a young boy; Amy knows little about her dad's past and wishes she could connect with him better; together, they travel to Vietnam to explore the country and Dan's history.

Police use facial recognition technology to arrest a suspected thief; a Canadian writer creates an artificial intelligence chat-bot to reconnect with a lost loved one; a London-based stock trader uses algorithms to beat the market at its own game.

Convinced the medieval witch trials were an attempt by a Jewish-Christian alliance to exterminate the Aryans, Himmler established a Special Assignment research team led by Reinhard Heydrich to build a database of medieval German witchcraft practices.

A therapy for a medical condition makes her heart stop, the experience takes her into another world filled with numbers and equations. A woman's travels in the Amazon lead to her death and experience of an afterlife that blurs with her surroundings.

Silent movie trivia really isn't in Justin and Mike's wheelhouse but they can't resist Buster Keaton's legacy in Cottage Grove, Ore.; they get an unexpected dose of.

The Ramessides rise to become some of the most powerful pharaohs in Egyptian history; but, a civil war ignited by a power vacuum threatens to destabilize an empire.

Galaxies form the grand structure of our cosmos, yet their origins remain a mystery; how did solitary stars evolve? Scientists trace the peculiar positions of ancient stars and search for supermassive black holes that roar to life at a galaxy's core.

A look at the fastest machines on Earth; they are thrilling with their horsepower, strength and bone-rattling speed, but for these speed demons to be the fastest and most powerful, they need to be truly colossal.

Police use facial recognition technology to arrest a suspected thief; a Canadian writer creates an artificial intelligence chat-bot to reconnect with a lost loved one; a London-based stock trader uses algorithms to beat the market at its own game.

Convinced the medieval witch trials were an attempt by a Jewish-Christian alliance to exterminate the Aryans, Himmler established a Special Assignment research team led by Reinhard Heydrich to build a database of medieval German witchcraft practices.

Silent movie trivia really isn't in Justin and Mike's wheelhouse but they can't resist Buster Keaton's legacy in Cottage Grove, Ore.; they get an unexpected dose of.

The Ramessides rise to become some of the most powerful pharaohs in Egyptian history; but, a civil war ignited by a power vacuum threatens to destabilize an empire.

A therapy for a medical condition makes her heart stop, the experience takes her into another world filled with numbers and equations. A woman's travels in the Amazon lead to her death and experience of an afterlife that blurs with her surroundings.

Galaxies form the grand structure of our cosmos, yet their origins remain a mystery; how did solitary stars evolve? Scientists trace the peculiar positions of ancient stars and search for supermassive black holes that roar to life at a galaxy's core.

A look at the fastest machines on Earth; they are thrilling with their horsepower, strength and bone-rattling speed, but for these speed demons to be the fastest and most powerful, they need to be truly colossal.

Convinced the medieval witch trials were an attempt by a Jewish-Christian alliance to exterminate the Aryans, Himmler established a Special Assignment research team led by Reinhard Heydrich to build a database of medieval German witchcraft practices.

The Ramessides rise to become some of the most powerful pharaohs in Egyptian history; but, a civil war ignited by a power vacuum threatens to destabilize an empire.

Police use facial recognition technology to arrest a suspected thief; a Canadian writer creates an artificial intelligence chat-bot to reconnect with a lost loved one; a London-based stock trader uses algorithms to beat the market at its own game.

Galaxies form the grand structure of our cosmos, yet their origins remain a mystery; how did solitary stars evolve? Scientists trace the peculiar positions of ancient stars and search for supermassive black holes that roar to life at a galaxy's core.

This documentary will examine how toxic elements of digital environment are dramatically transforming society in negative ways, just as the prophetic, popular futurist Marshall McLuhan predicted 60 years ago.

A look at the fastest machines on Earth; they are thrilling with their horsepower, strength and bone-rattling speed, but for these speed demons to be the fastest and most powerful, they need to be truly colossal.

A therapy for a medical condition makes her heart stop, the experience takes her into another world filled with numbers and equations. A woman's travels in the Amazon lead to her death and experience of an afterlife that blurs with her surroundings.

Convinced the medieval witch trials were an attempt by a Jewish-Christian alliance to exterminate the Aryans, Himmler established a Special Assignment research team led by Reinhard Heydrich to build a database of medieval German witchcraft practices.

The Ramessides rise to become some of the most powerful pharaohs in Egyptian history; but, a civil war ignited by a power vacuum threatens to destabilize an empire.

Silent movie trivia really isn't in Justin and Mike's wheelhouse but they can't resist Buster Keaton's legacy in Cottage Grove, Ore.; they get an unexpected dose of.

Galaxies form the grand structure of our cosmos, yet their origins remain a mystery; how did solitary stars evolve? Scientists trace the peculiar positions of ancient stars and search for supermassive black holes that roar to life at a galaxy's core.

Police use facial recognition technology to arrest a suspected thief; a Canadian writer creates an artificial intelligence chat-bot to reconnect with a lost loved one; a London-based stock trader uses algorithms to beat the market at its own game.

After years of fighting arm-in-arm with their British compatriots, American colonists are shocked by stern import duties enacted over the heads of the colonies.

In her teens, Samantha is told by doctors that the painful periods she was experiencing were nothing to worry about. Brett is a self-employed civil engineer that starts developing back pain, and the cocktail of medications affects his liver.

There is high strangeness on Archuleta Mesa; it's no wonder, with the whisperings of an underground alien base; could Area 51 have been an elaborate decoy all along?

Coastal erosion exposes skeletal remains; researchers discover a special type of spider; new evidence leads archaeologists to unravel the unsolved mystery of the lost Roanoke settlers; thousands of dead seals confound a wildlife enigma.

A look at great thinkers who have left their mark on scientific discovery.

The age of drone warfare and autonomous defense is upon us and to carry out remote operations, drones, missiles and defense systems employ game-changing sensors, algorithms and control centres.

At an off-grid site, Jordyn and Johnny, equipped with cameras, seek local insights into hauntings; they then cut electricity to look for fabled spirits or new phenomena.

After years of fighting arm-in-arm with their British compatriots, American colonists are shocked by stern import duties enacted over the heads of the colonies.

This documentary will examine how toxic elements of digital environment are dramatically transforming society in negative ways, just as the prophetic, popular futurist Marshall McLuhan predicted 60 years ago.

In her teens, Samantha is told by doctors that the painful periods she was experiencing were nothing to worry about. Brett is a self-employed civil engineer that starts developing back pain, and the cocktail of medications affects his liver.

There is high strangeness on Archuleta Mesa; it's no wonder, with the whisperings of an underground alien base; could Area 51 have been an elaborate decoy all along?

Coastal erosion exposes skeletal remains; researchers discover a special type of spider; new evidence leads archaeologists to unravel the unsolved mystery of the lost Roanoke settlers; thousands of dead seals confound a wildlife enigma.

A look at great thinkers who have left their mark on scientific discovery.

The age of drone warfare and autonomous defense is upon us and to carry out remote operations, drones, missiles and defense systems employ game-changing sensors, algorithms and control centres.

At an off-grid site, Jordyn and Johnny, equipped with cameras, seek local insights into hauntings; they then cut electricity to look for fabled spirits or new phenomena.

After years of fighting arm-in-arm with their British compatriots, American colonists are shocked by stern import duties enacted over the heads of the colonies.

In her teens, Samantha is told by doctors that the painful periods she was experiencing were nothing to worry about. Brett is a self-employed civil engineer that starts developing back pain, and the cocktail of medications affects his liver.

There is high strangeness on Archuleta Mesa; it's no wonder, with the whisperings of an underground alien base; could Area 51 have been an elaborate decoy all along?

Coastal erosion exposes skeletal remains; researchers discover a special type of spider; new evidence leads archaeologists to unravel the unsolved mystery of the lost Roanoke settlers; thousands of dead seals confound a wildlife enigma.

A look at great thinkers who have left their mark on scientific discovery.

At an off-grid site, Jordyn and Johnny, equipped with cameras, seek local insights into hauntings; they then cut electricity to look for fabled spirits or new phenomena.

After years of fighting arm-in-arm with their British compatriots, American colonists are shocked by stern import duties enacted over the heads of the colonies.

In her teens, Samantha is told by doctors that the painful periods she was experiencing were nothing to worry about. Brett is a self-employed civil engineer that starts developing back pain, and the cocktail of medications affects his liver.

The age of drone warfare and autonomous defense is upon us and to carry out remote operations, drones, missiles and defense systems employ game-changing sensors, algorithms and control centres.

There is high strangeness on Archuleta Mesa; it's no wonder, with the whisperings of an underground alien base; could Area 51 have been an elaborate decoy all along?

Coastal erosion exposes skeletal remains; researchers discover a special type of spider; new evidence leads archaeologists to unravel the unsolved mystery of the lost Roanoke settlers; thousands of dead seals confound a wildlife enigma.

A look at great thinkers who have left their mark on scientific discovery.

At an off-grid site, Jordyn and Johnny, equipped with cameras, seek local insights into hauntings; they then cut electricity to look for fabled spirits or new phenomena.

Jay hopes to make a mega deal for a massive stack of games in Chatham, Ontario- but will there be any wiggle room on prices?

A therapy for a medical condition makes her heart stop, the experience takes her into another world filled with numbers and equations. A woman's travels in the Amazon lead to her death and experience of an afterlife that blurs with her surroundings.

Galaxies form the grand structure of our cosmos, yet their origins remain a mystery; how did solitary stars evolve? Scientists trace the peculiar positions of ancient stars and search for supermassive black holes that roar to life at a galaxy's core.

California is home to many sightings of unidentified flying objects; the state's size contributes to explained and unexplained sightings.

Speed is a major competitive strategy; while humans measure and focus on how to achieve it in greater quantities, Earth's creatures have adapted and evolved over long periods to achieve acceleration.

A look at the fastest machines on Earth; they are thrilling with their horsepower, strength and bone-rattling speed, but for these speed demons to be the fastest and most powerful, they need to be truly colossal.

At an off-grid site, Jordyn and Johnny, equipped with cameras, seek local insights into hauntings; they then cut electricity to look for fabled spirits or new phenomena.

At an off-grid site, Jordyn and Johnny, equipped with cameras, seek local insights into hauntings; they then cut electricity to look for fabled spirits or new phenomena.

Two of the deadliest.

A therapy for a medical condition makes her heart stop, the experience takes her into another world filled with numbers and equations. A woman's travels in the Amazon lead to her death and experience of an afterlife that blurs with her surroundings.

Galaxies form the grand structure of our cosmos, yet their origins remain a mystery; how did solitary stars evolve? Scientists trace the peculiar positions of ancient stars and search for supermassive black holes that roar to life at a galaxy's core.

California is home to many sightings of unidentified flying objects; the state's size contributes to explained and unexplained sightings.

Speed is a major competitive strategy; while humans measure and focus on how to achieve it in greater quantities, Earth's creatures have adapted and evolved over long periods to achieve acceleration.

A look at the fastest machines on Earth; they are thrilling with their horsepower, strength and bone-rattling speed, but for these speed demons to be the fastest and most powerful, they need to be truly colossal.

At an off-grid site, Jordyn and Johnny, equipped with cameras, seek local insights into hauntings; they then cut electricity to look for fabled spirits or new phenomena.

At an off-grid site, Jordyn and Johnny, equipped with cameras, seek local insights into hauntings; they then cut electricity to look for fabled spirits or new phenomena.

Aleck cherishes his Romanian roots but is unaware of his mom's past; after secretly escaping communist rule, Gabriela doesn't talk about her life in Romania; now, ready to open up, she takes Aleck to Romania to seek closure and embrace his identity.

A therapy for a medical condition makes her heart stop, the experience takes her into another world filled with numbers and equations. A woman's travels in the Amazon lead to her death and experience of an afterlife that blurs with her surroundings.

Galaxies form the grand structure of our cosmos, yet their origins remain a mystery; how did solitary stars evolve? Scientists trace the peculiar positions of ancient stars and search for supermassive black holes that roar to life at a galaxy's core.

California is home to many sightings of unidentified flying objects; the state's size contributes to explained and unexplained sightings.

At an off-grid site, Jordyn and Johnny, equipped with cameras, seek local insights into hauntings; they then cut electricity to look for fabled spirits or new phenomena.

At an off-grid site, Jordyn and Johnny, equipped with cameras, seek local insights into hauntings; they then cut electricity to look for fabled spirits or new phenomena.

Speed is a major competitive strategy; while humans measure and focus on how to achieve it in greater quantities, Earth's creatures have adapted and evolved over long periods to achieve acceleration.

Aleck cherishes his Romanian roots but is unaware of his mom's past; after secretly escaping communist rule, Gabriela doesn't talk about her life in Romania; now, ready to open up, she takes Aleck to Romania to seek closure and embrace his identity.

A look at the fastest machines on Earth; they are thrilling with their horsepower, strength and bone-rattling speed, but for these speed demons to be the fastest and most powerful, they need to be truly colossal.

Two of the deadliest.

California is home to many sightings of unidentified flying objects; the state's size contributes to explained and unexplained sightings.

Galaxies form the grand structure of our cosmos, yet their origins remain a mystery; how did solitary stars evolve? Scientists trace the peculiar positions of ancient stars and search for supermassive black holes that roar to life at a galaxy's core.

A therapy for a medical condition makes her heart stop, the experience takes her into another world filled with numbers and equations. A woman's travels in the Amazon lead to her death and experience of an afterlife that blurs with her surroundings.

A look at the fastest machines on Earth; they are thrilling with their horsepower, strength and bone-rattling speed, but for these speed demons to be the fastest and most powerful, they need to be truly colossal.

Speed is a major competitive strategy; while humans measure and focus on how to achieve it in greater quantities, Earth's creatures have adapted and evolved over long periods to achieve acceleration.

When historically low water levels in Texas.

California is home to many sightings of unidentified flying objects; the state's size contributes to explained and unexplained sightings.

Pharaohs were Gods among men; the story of these iconic figures from the first pharaoh Narmer through to Cleopatra VII.

Jay visits A & C Games in Toronto and finds unbelievable video game gold.

Convinced the medieval witch trials were an attempt by a Jewish-Christian alliance to exterminate the Aryans, Himmler established a Special Assignment research team led by Reinhard Heydrich to build a database of medieval German witchcraft practices.

Liebensraum breeding programs and bunk studies in heredity helps to justify mass sterilizations and genocide; in concentration camps, twisted experiments like Josef Mengele's twin studies masquerade as science and justify all manner of Nazi horrors.

Ancient terraces made of volcanic rock in Indonesia leave their origin still in enigma; hundreds of human skeletal remains are unearthed; a blood-red beach on Hormuz Island ignites speculations; penguin remains are discovered.

When historically low water levels in Texas.

Transylvanian fortress; medieval stronghold; ruins atop a peninsula.

Pharaohs were Gods among men; the story of these iconic figures from the first pharaoh Narmer through to Cleopatra VII.

Liebensraum breeding programs and bunk studies in heredity helps to justify mass sterilizations and genocide; in concentration camps, twisted experiments like Josef Mengele's twin studies masquerade as science and justify all manner of Nazi horrors.

California is home to many sightings of unidentified flying objects; the state's size contributes to explained and unexplained sightings.

Convinced the medieval witch trials were an attempt by a Jewish-Christian alliance to exterminate the Aryans, Himmler established a Special Assignment research team led by Reinhard Heydrich to build a database of medieval German witchcraft practices.

This documentary will examine how toxic elements of digital environment are dramatically transforming society in negative ways, just as the prophetic, popular futurist Marshall McLuhan predicted 60 years ago.

Ancient terraces made of volcanic rock in Indonesia leave their origin still in enigma; hundreds of human skeletal remains are unearthed; a blood-red beach on Hormuz Island ignites speculations; penguin remains are discovered.

Liebensraum breeding programs and bunk studies in heredity helps to justify mass sterilizations and genocide; in concentration camps, twisted experiments like Josef Mengele's twin studies masquerade as science and justify all manner of Nazi horrors.

Transylvanian fortress; medieval stronghold; ruins atop a peninsula.

Pharaohs were Gods among men; the story of these iconic figures from the first pharaoh Narmer through to Cleopatra VII.

When historically low water levels in Texas.

California is home to many sightings of unidentified flying objects; the state's size contributes to explained and unexplained sightings.

Liebensraum breeding programs and bunk studies in heredity helps to justify mass sterilizations and genocide; in concentration camps, twisted experiments like Josef Mengele's twin studies masquerade as science and justify all manner of Nazi horrors.

Transylvanian fortress; medieval stronghold; ruins atop a peninsula.

Convinced the medieval witch trials were an attempt by a Jewish-Christian alliance to exterminate the Aryans, Himmler established a Special Assignment research team led by Reinhard Heydrich to build a database of medieval German witchcraft practices.

Ancient terraces made of volcanic rock in Indonesia leave their origin still in enigma; hundreds of human skeletal remains are unearthed; a blood-red beach on Hormuz Island ignites speculations; penguin remains are discovered.

Pharaohs were Gods among men; the story of these iconic figures from the first pharaoh Narmer through to Cleopatra VII.

Transylvanian fortress; medieval stronghold; ruins atop a peninsula.

California is home to many sightings of unidentified flying objects; the state's size contributes to explained and unexplained sightings.

Convinced the medieval witch trials were an attempt by a Jewish-Christian alliance to exterminate the Aryans, Himmler established a Special Assignment research team led by Reinhard Heydrich to build a database of medieval German witchcraft practices.

Bill grew up in the epicenter of the Troubles in Northern Ireland; decades later, Sophie travels with Bill to Northern Ireland where they reconnect with their country and history, to help her dad open up and heal from the tragedy.