Mysterious industrial waste and abandoned homes in an uninhabited part of Greenland; strange ditches and mounds deep within the Arctic Circle; a huge pyramid on the Kazakh steppe; a ball of golden fur in Yukon's gold fields.

Dateline 1903, 4:10am. One of the largest and deadliest rock slides in Canadian history nearly buried the mining town including its local bank. In the years after, a legend of 500,000 lost banknotes floated around.

Doris takes her daughter, Shetin, to Ghana to learn the truth behind her royal bloodline.

Learn whether the animal kingdom hold the key to immortality; when humans are injured, we have the benefit of medicine and surgery; these skills pale in comparison to nature's super healers.

The search for the lost Viking continues, with the team venturing further into Minnesota lore as residents offer up theories of what happened to the lost Viking. The team is led to multiple sites where remnants of the lost Viking voyage may reside.

Under Saddam Hussein's rule, fearsome purges, mass genocides, political executions, and invasions of neighboring powers become the norm; early murderous tendencies set the stage for years of ruthless resolve.

Billions of years ago, the first sign of life emerged on Earth; how exactly did this miraculous event unfold? As we probe the past, astronomers turn their telescopes to exoplanets to uncover vital clues about our own origins on planet Earth.

At the sacrificial altar 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.

A visit to a late 1700s mansion now bed and breakfast in New Orleans' Garden District gets off to a surprising start when an event from above startles the investigators.

A gruesome story penned on a centuries-old scroll makes its way across Europe; a stone-age mummy emerges from the icy alps; an ancient city in Afghanistan is reduced to rubble.

An archeologist makes the 22,000-foot journey to the peak of an Argentinian mountain near an active volcano and discovers the remains of children perfectly preserved as though they are asleep.

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.

Ines travels back to Chile with her daughter Carolina to reflect on the different lives they live; Ines reveals the weight of her past, so her daughter may understand the challenges she faced during times of a dictatorship.

From the Hindenburg disaster, to the Iceland Eruption, Chornobyl, the Dust Bowl Drought, and the Cascadia Earthquake; the science and engineering behind these events, and the lessons learned.

At the sacrificial altar 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.

A visit to a late 1700s mansion now bed and breakfast in New Orleans' Garden District gets off to a surprising start when an event from above startles the investigators.

A gruesome story penned on a centuries-old scroll makes its way across Europe; a stone-age mummy emerges from the icy alps; an ancient city in Afghanistan is reduced to rubble.

An archeologist makes the 22,000-foot journey to the peak of an Argentinian mountain near an active volcano and discovers the remains of children perfectly preserved as though they are asleep.

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.

From the Hindenburg disaster, to the Iceland Eruption, Chornobyl, the Dust Bowl Drought, and the Cascadia Earthquake; the science and engineering behind these events, and the lessons learned.

At the sacrificial altar 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.

A gruesome story penned on a centuries-old scroll makes its way across Europe; a stone-age mummy emerges from the icy alps; an ancient city in Afghanistan is reduced to rubble.

Jay makes an unexpected visit to Good Time Games in Waterloo and cannot believe what he finds.

A visit to a late 1700s mansion now bed and breakfast in New Orleans' Garden District gets off to a surprising start when an event from above startles the investigators.

On the 250th anniversary of the Declaration of Independence, forgotten patriots of the American Revolutionary War tell their stories for the first time.

From the Hindenburg disaster, to the Iceland Eruption, Chornobyl, the Dust Bowl Drought, and the Cascadia Earthquake; the science and engineering behind these events, and the lessons learned.

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.

On the 250th anniversary of the Declaration of Independence, forgotten patriots of the American Revolutionary War tell their stories for the first time.

An archeologist makes the 22,000-foot journey to the peak of an Argentinian mountain near an active volcano and discovers the remains of children perfectly preserved as though they are asleep.

A visit to a late 1700s mansion now bed and breakfast in New Orleans' Garden District gets off to a surprising start when an event from above startles the investigators.

A gruesome story penned on a centuries-old scroll makes its way across Europe; a stone-age mummy emerges from the icy alps; an ancient city in Afghanistan is reduced to rubble.

At the sacrificial altar 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.

From the Hindenburg disaster, to the Iceland Eruption, Chornobyl, the Dust Bowl Drought, and the Cascadia Earthquake; the science and engineering behind these events, and the lessons learned.

An archeologist makes the 22,000-foot journey to the peak of an Argentinian mountain near an active volcano and discovers the remains of children perfectly preserved as though they are asleep.

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 woman is hit by a truck while crossing the street, plunging her into an out-of-body experience that profoundly changes her life; a medical mishap causes a journey into a realm of light for a quadriplegic man.

Under Saddam Hussein's rule, fearsome purges, mass genocides, political executions, and invasions of neighboring powers become the norm; early murderous tendencies set the stage for years of ruthless resolve.

Young adults accompany their parents back to their country of origin, where they relive the sacrifice, struggle and dramatic circumstances that led to their parents' emigration.

Each species has undergone eons of beta testing, animal vs. animal, animal vs. element and even animal vs. human; take a peek under the hood of these critters; what does it take to make them top performers?

Billions of years ago, the first sign of life emerged on Earth; how exactly did this miraculous event unfold? As we probe the past, astronomers turn their telescopes to exoplanets to uncover vital clues about our own origins on planet Earth.

For thousands of years, the pharaohs have adhered to the same traditions and rituals; one pharaoh steps in to change the rules of the game; what happens when a king challenges the very institutions that granted him power?

The spirit of exploration drives scientists into extreme environments; biochemist Peng Jiamu vanishes in the Lop Desert; navigator Jean-François La Pérouse faces treacherous seas while seeking the Northwest Passage.

A woman is hit by a truck while crossing the street, plunging her into an out-of-body experience that profoundly changes her life; a medical mishap causes a journey into a realm of light for a quadriplegic man.

Dateline 1903, 4:10am. One of the largest and deadliest rock slides in Canadian history nearly buried the mining town including its local bank. In the years after, a legend of 500,000 lost banknotes floated around.

Under Saddam Hussein's rule, fearsome purges, mass genocides, political executions, and invasions of neighboring powers become the norm; early murderous tendencies set the stage for years of ruthless resolve.

Each species has undergone eons of beta testing, animal vs. animal, animal vs. element and even animal vs. human; take a peek under the hood of these critters; what does it take to make them top performers?

Billions of years ago, the first sign of life emerged on Earth; how exactly did this miraculous event unfold? As we probe the past, astronomers turn their telescopes to exoplanets to uncover vital clues about our own origins on planet Earth.

For thousands of years, the pharaohs have adhered to the same traditions and rituals; one pharaoh steps in to change the rules of the game; what happens when a king challenges the very institutions that granted him power?

The spirit of exploration drives scientists into extreme environments; biochemist Peng Jiamu vanishes in the Lop Desert; navigator Jean-François La Pérouse faces treacherous seas while seeking the Northwest Passage.

Dateline 1903, 4:10am. One of the largest and deadliest rock slides in Canadian history nearly buried the mining town including its local bank. In the years after, a legend of 500,000 lost banknotes floated around.

A woman is hit by a truck while crossing the street, plunging her into an out-of-body experience that profoundly changes her life; a medical mishap causes a journey into a realm of light for a quadriplegic man.

Each species has undergone eons of beta testing, animal vs. animal, animal vs. element and even animal vs. human; take a peek under the hood of these critters; what does it take to make them top performers?

Under Saddam Hussein's rule, fearsome purges, mass genocides, political executions, and invasions of neighboring powers become the norm; early murderous tendencies set the stage for years of ruthless resolve.

The spirit of exploration drives scientists into extreme environments; biochemist Peng Jiamu vanishes in the Lop Desert; navigator Jean-François La Pérouse faces treacherous seas while seeking the Northwest Passage.

Billions of years ago, the first sign of life emerged on Earth; how exactly did this miraculous event unfold? As we probe the past, astronomers turn their telescopes to exoplanets to uncover vital clues about our own origins on planet Earth.

For thousands of years, the pharaohs have adhered to the same traditions and rituals; one pharaoh steps in to change the rules of the game; what happens when a king challenges the very institutions that granted him power?

A woman is hit by a truck while crossing the street, plunging her into an out-of-body experience that profoundly changes her life; a medical mishap causes a journey into a realm of light for a quadriplegic man.

The spirit of exploration drives scientists into extreme environments; biochemist Peng Jiamu vanishes in the Lop Desert; navigator Jean-François La Pérouse faces treacherous seas while seeking the Northwest Passage.

Under Saddam Hussein's rule, fearsome purges, mass genocides, political executions, and invasions of neighboring powers become the norm; early murderous tendencies set the stage for years of ruthless resolve.

Each species has undergone eons of beta testing, animal vs. animal, animal vs. element and even animal vs. human; take a peek under the hood of these critters; what does it take to make them top performers?

Billions of years ago, the first sign of life emerged on Earth; how exactly did this miraculous event unfold? As we probe the past, astronomers turn their telescopes to exoplanets to uncover vital clues about our own origins on planet Earth.

For thousands of years, the pharaohs have adhered to the same traditions and rituals; one pharaoh steps in to change the rules of the game; what happens when a king challenges the very institutions that granted him power?

Dateline 1903, 4:10am. One of the largest and deadliest rock slides in Canadian history nearly buried the mining town including its local bank. In the years after, a legend of 500,000 lost banknotes floated around.

Jay scrounges for games in Toronto and Mississauga and battles a downward swing in momentum.

A woman is hit by a truck while crossing the street, plunging her into an out-of-body experience that profoundly changes her life; a medical mishap causes a journey into a realm of light for a quadriplegic man.

Jordyn and Johnny are in Moose Jaw, Saskatchewan, home to tunnels that sprawl underneath most of the city's downtown. While much of the system has been converted into a tourist attraction, some residue of the spirit realm still clings onto the space.

Under Saddam Hussein's rule, fearsome purges, mass genocides, political executions, and invasions of neighboring powers become the norm; early murderous tendencies set the stage for years of ruthless resolve.

An archeologist makes the 22,000-foot journey to the peak of an Argentinian mountain near an active volcano and discovers the remains of children perfectly preserved as though they are asleep.

The search for the lost Viking continues, with the team venturing further into Minnesota lore as residents offer up theories of what happened to the lost Viking. The team is led to multiple sites where remnants of the lost Viking voyage may reside.

Young adults accompany their parents back to their country of origin, where they relive the sacrifice, struggle and dramatic circumstances that led to their parents' emigration.

On the 250th anniversary of the Declaration of Independence, forgotten patriots of the American Revolutionary War tell their stories for the first time.

Each species has undergone eons of beta testing, animal vs. animal, animal vs. element and even animal vs. human; take a peek under the hood of these critters; what does it take to make them top performers?

Billions of years ago, the first sign of life emerged on Earth; how exactly did this miraculous event unfold? As we probe the past, astronomers turn their telescopes to exoplanets to uncover vital clues about our own origins on planet Earth.

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.

For thousands of years, the pharaohs have adhered to the same traditions and rituals; one pharaoh steps in to change the rules of the game; what happens when a king challenges the very institutions that granted him power?

At the sacrificial altar 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.

The spirit of exploration drives scientists into extreme environments; biochemist Peng Jiamu vanishes in the Lop Desert; navigator Jean-François La Pérouse faces treacherous seas while seeking the Northwest Passage.

A Kazakh farmer discovers ancient burial sites related to the legend of the Amazon women warriors; a military structure in the Italian Alps; a shrine in the Indian Himalayas; a fossilized species.

A woman is hit by a truck while crossing the street, plunging her into an out-of-body experience that profoundly changes her life; a medical mishap causes a journey into a realm of light for a quadriplegic man.

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

Dateline 1903, 4:10am. One of the largest and deadliest rock slides in Canadian history nearly buried the mining town including its local bank. In the years after, a legend of 500,000 lost banknotes floated around.

An archeologist makes the 22,000-foot journey to the peak of an Argentinian mountain near an active volcano and discovers the remains of children perfectly preserved as though they are asleep.

Under Saddam Hussein's rule, fearsome purges, mass genocides, political executions, and invasions of neighboring powers become the norm; early murderous tendencies set the stage for years of ruthless resolve.

Jordyn and Johnny are in Moose Jaw, Saskatchewan, home to tunnels that sprawl underneath most of the city's downtown. While much of the system has been converted into a tourist attraction, some residue of the spirit realm still clings onto the space.

The search for the lost Viking continues, with the team venturing further into Minnesota lore as residents offer up theories of what happened to the lost Viking. The team is led to multiple sites where remnants of the lost Viking voyage may reside.

Each species has undergone eons of beta testing, animal vs. animal, animal vs. element and even animal vs. human; take a peek under the hood of these critters; what does it take to make them top performers?

At the sacrificial altar 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.

Billions of years ago, the first sign of life emerged on Earth; how exactly did this miraculous event unfold? As we probe the past, astronomers turn their telescopes to exoplanets to uncover vital clues about our own origins on planet Earth.

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.

For thousands of years, the pharaohs have adhered to the same traditions and rituals; one pharaoh steps in to change the rules of the game; what happens when a king challenges the very institutions that granted him power?

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

The spirit of exploration drives scientists into extreme environments; biochemist Peng Jiamu vanishes in the Lop Desert; navigator Jean-François La Pérouse faces treacherous seas while seeking the Northwest Passage.

A Kazakh farmer discovers ancient burial sites related to the legend of the Amazon women warriors; a military structure in the Italian Alps; a shrine in the Indian Himalayas; a fossilized species.

Dateline 1903, 4:10am. One of the largest and deadliest rock slides in Canadian history nearly buried the mining town including its local bank. In the years after, a legend of 500,000 lost banknotes floated around.

An archeologist makes the 22,000-foot journey to the peak of an Argentinian mountain near an active volcano and discovers the remains of children perfectly preserved as though they are asleep.

A woman is hit by a truck while crossing the street, plunging her into an out-of-body experience that profoundly changes her life; a medical mishap causes a journey into a realm of light for a quadriplegic man.

Jordyn and Johnny are in Moose Jaw, Saskatchewan, home to tunnels that sprawl underneath most of the city's downtown. While much of the system has been converted into a tourist attraction, some residue of the spirit realm still clings onto the space.

Each species has undergone eons of beta testing, animal vs. animal, animal vs. element and even animal vs. human; take a peek under the hood of these critters; what does it take to make them top performers?

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.

Under Saddam Hussein's rule, fearsome purges, mass genocides, political executions, and invasions of neighboring powers become the norm; early murderous tendencies set the stage for years of ruthless resolve.

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

The search for the lost Viking continues, with the team venturing further into Minnesota lore as residents offer up theories of what happened to the lost Viking. The team is led to multiple sites where remnants of the lost Viking voyage may reside.

The spirit of exploration drives scientists into extreme environments; biochemist Peng Jiamu vanishes in the Lop Desert; navigator Jean-François La Pérouse faces treacherous seas while seeking the Northwest Passage.

At the sacrificial altar 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.

Billions of years ago, the first sign of life emerged on Earth; how exactly did this miraculous event unfold? As we probe the past, astronomers turn their telescopes to exoplanets to uncover vital clues about our own origins on planet Earth.

A Kazakh farmer discovers ancient burial sites related to the legend of the Amazon women warriors; a military structure in the Italian Alps; a shrine in the Indian Himalayas; a fossilized species.

For thousands of years, the pharaohs have adhered to the same traditions and rituals; one pharaoh steps in to change the rules of the game; what happens when a king challenges the very institutions that granted him power?

Jordyn and Johnny are in Moose Jaw, Saskatchewan, home to tunnels that sprawl underneath most of the city's downtown. While much of the system has been converted into a tourist attraction, some residue of the spirit realm still clings onto the space.

A woman is hit by a truck while crossing the street, plunging her into an out-of-body experience that profoundly changes her life; a medical mishap causes a journey into a realm of light for a quadriplegic man.

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.

The spirit of exploration drives scientists into extreme environments; biochemist Peng Jiamu vanishes in the Lop Desert; navigator Jean-François La Pérouse faces treacherous seas while seeking the Northwest Passage.

An archeologist makes the 22,000-foot journey to the peak of an Argentinian mountain near an active volcano and discovers the remains of children perfectly preserved as though they are asleep.

Under Saddam Hussein's rule, fearsome purges, mass genocides, political executions, and invasions of neighboring powers become the norm; early murderous tendencies set the stage for years of ruthless resolve.

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

A Kazakh farmer discovers ancient burial sites related to the legend of the Amazon women warriors; a military structure in the Italian Alps; a shrine in the Indian Himalayas; a fossilized species.

Each species has undergone eons of beta testing, animal vs. animal, animal vs. element and even animal vs. human; take a peek under the hood of these critters; what does it take to make them top performers?

At the sacrificial altar 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.

Billions of years ago, the first sign of life emerged on Earth; how exactly did this miraculous event unfold? As we probe the past, astronomers turn their telescopes to exoplanets to uncover vital clues about our own origins on planet Earth.

The search for the lost Viking continues, with the team venturing further into Minnesota lore as residents offer up theories of what happened to the lost Viking. The team is led to multiple sites where remnants of the lost Viking voyage may reside.

For thousands of years, the pharaohs have adhered to the same traditions and rituals; one pharaoh steps in to change the rules of the game; what happens when a king challenges the very institutions that granted him power?

On the 250th anniversary of the Declaration of Independence, forgotten patriots of the American Revolutionary War tell their stories for the first time.

Dateline 1903, 4:10am. One of the largest and deadliest rock slides in Canadian history nearly buried the mining town including its local bank. In the years after, a legend of 500,000 lost banknotes floated around.

Jay scrounges for games in Toronto and Mississauga and battles a downward swing in momentum.

Jordyn and Johnny are in Moose Jaw, Saskatchewan, home to tunnels that sprawl underneath most of the city's downtown. While much of the system has been converted into a tourist attraction, some residue of the spirit realm still clings onto the space.

An archeologist makes the 22,000-foot journey to the peak of an Argentinian mountain near an active volcano and discovers the remains of children perfectly preserved as though they are asleep.

The search for the lost Viking continues, with the team venturing further into Minnesota lore as residents offer up theories of what happened to the lost Viking. The team is led to multiple sites where remnants of the lost Viking voyage may reside.

On the 250th anniversary of the Declaration of Independence, forgotten patriots of the American Revolutionary War tell their stories for the first time.

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.

At the sacrificial altar 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.

A Kazakh farmer discovers ancient burial sites related to the legend of the Amazon women warriors; a military structure in the Italian Alps; a shrine in the Indian Himalayas; a fossilized species.

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

An archeologist makes the 22,000-foot journey to the peak of an Argentinian mountain near an active volcano and discovers the remains of children perfectly preserved as though they are asleep.

Jordyn and Johnny are in Moose Jaw, Saskatchewan, home to tunnels that sprawl underneath most of the city's downtown. While much of the system has been converted into a tourist attraction, some residue of the spirit realm still clings onto the space.

The search for the lost Viking continues, with the team venturing further into Minnesota lore as residents offer up theories of what happened to the lost Viking. The team is led to multiple sites where remnants of the lost Viking voyage may reside.

At the sacrificial altar 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.

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.

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

A Kazakh farmer discovers ancient burial sites related to the legend of the Amazon women warriors; a military structure in the Italian Alps; a shrine in the Indian Himalayas; a fossilized species.

An archeologist makes the 22,000-foot journey to the peak of an Argentinian mountain near an active volcano and discovers the remains of children perfectly preserved as though they are asleep.

Jordyn and Johnny are in Moose Jaw, Saskatchewan, home to tunnels that sprawl underneath most of the city's downtown. While much of the system has been converted into a tourist attraction, some residue of the spirit realm still clings onto the space.

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.

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

The search for the lost Viking continues, with the team venturing further into Minnesota lore as residents offer up theories of what happened to the lost Viking. The team is led to multiple sites where remnants of the lost Viking voyage may reside.

At the sacrificial altar 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.

A Kazakh farmer discovers ancient burial sites related to the legend of the Amazon women warriors; a military structure in the Italian Alps; a shrine in the Indian Himalayas; a fossilized species.

Jordyn and Johnny are in Moose Jaw, Saskatchewan, home to tunnels that sprawl underneath most of the city's downtown. While much of the system has been converted into a tourist attraction, some residue of the spirit realm still clings onto the space.

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.

An archeologist makes the 22,000-foot journey to the peak of an Argentinian mountain near an active volcano and discovers the remains of children perfectly preserved as though they are asleep.

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

A Kazakh farmer discovers ancient burial sites related to the legend of the Amazon women warriors; a military structure in the Italian Alps; a shrine in the Indian Himalayas; a fossilized species.

At the sacrificial altar 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.

The search for the lost Viking continues, with the team venturing further into Minnesota lore as residents offer up theories of what happened to the lost Viking. The team is led to multiple sites where remnants of the lost Viking voyage may reside.

On the 250th anniversary of the Declaration of Independence, forgotten patriots of the American Revolutionary War tell their stories for the first time.