From Mexico's mystifying Zone of Silence, to Markawasi Plateau in Peru, known for its frequent UFO sightings, were these the homes of ancient extraterrestrials?

Worldwide, there have been hundreds of mysterious sightings spanning many centuries. Throughout history, these sightings have spawned countless stories.

Witnesses describe a series of events surrounding the now legendary crash, while an incredible new technology attempts to read words on a 70 year old photograph that may hold clues to the mystery: Did an extraterrestrial spaceship crash at Roswell?

Hamilton has amassed an extraordinary, and sometimes disturbing, collection of Nazi memorabilia. These include a collection of Nazi badges that were sold to raise money for the German poor and an ammunition box full of silver bullion bars.

In 1587, over 100 settlers landed in the New World to establish England's first permanent colony. Three years later, they had vanished. Josh Bernstein is on the trail of America's oldest missing persons case.

A former U.S. Navy radar operator emerges from the shadows to reveal the terrifying day it rained UFOs. U.S. Navy personnel unveil new details including an explanation of why UFOs are sighted over oceans.

After investing in a treasure hunt off the coast of Florida, Marty Lagina and Craig Tester are thrilled when their search uncovers rare artefacts. But they must quickly come to terms with the complex world of treasure ownership.

A house that narrowly dodges the path of a tornado. Rain that falls from the sky like blood. And lightning that follows you... into your home. Our world is full of strange and mysterious weather phenomenon that we still have no explanation for.

From Mexico's mystifying Zone of Silence, to Markawasi Plateau in Peru, known for its frequent UFO sightings, were these the homes of ancient extraterrestrials?

Worldwide, there have been hundreds of mysterious sightings spanning many centuries. Throughout history, these sightings have spawned countless stories.

Witnesses describe a series of events surrounding the now legendary crash, while an incredible new technology attempts to read words on a 70 year old photograph that may hold clues to the mystery: Did an extraterrestrial spaceship crash at Roswell?

Hamilton has amassed an extraordinary, and sometimes disturbing, collection of Nazi memorabilia. These include a collection of Nazi badges that were sold to raise money for the German poor and an ammunition box full of silver bullion bars.

In 1587, over 100 settlers landed in the New World to establish England's first permanent colony. Three years later, they had vanished. Josh Bernstein is on the trail of America's oldest missing persons case.

A former U.S. Navy radar operator emerges from the shadows to reveal the terrifying day it rained UFOs. U.S. Navy personnel unveil new details including an explanation of why UFOs are sighted over oceans.

After investing in a treasure hunt off the coast of Florida, Marty Lagina and Craig Tester are thrilled when their search uncovers rare artefacts. But they must quickly come to terms with the complex world of treasure ownership.

A house that narrowly dodges the path of a tornado. Rain that falls from the sky like blood. And lightning that follows you... into your home. Our world is full of strange and mysterious weather phenomenon that we still have no explanation for.

From Mexico's mystifying Zone of Silence, to Markawasi Plateau in Peru, known for its frequent UFO sightings, were these the homes of ancient extraterrestrials?

Worldwide, there have been hundreds of mysterious sightings spanning many centuries. Throughout history, these sightings have spawned countless stories.

Witnesses describe a series of events surrounding the now legendary crash, while an incredible new technology attempts to read words on a 70 year old photograph that may hold clues to the mystery: Did an extraterrestrial spaceship crash at Roswell?

Hamilton has amassed an extraordinary, and sometimes disturbing, collection of Nazi memorabilia. These include a collection of Nazi badges that were sold to raise money for the German poor and an ammunition box full of silver bullion bars.

Did Viking explorers Erik the Red and Leif the Lucky make it all the way across the Atlantic to America 500 years before Columbus? Josh Bernstein sails a Viking ship from Denmark to discover what made the Vikings such masterful mariners.

The list of military eyewitnesses describing strange and threatening unidentified craft in U.S airspace is growing. And now, a U.S. Navy radar operator has provided something more: actual coordinates where UFOS appeared and disappeared.

The Laginas are astounded to learn that on a trip to Arizona, Gary Drayton may have gotten to the bottom of one the biggest treasure mysteries, one that has resulted in countless deaths and disappearance for those obsessed with finding it.

A miraculous meteorite falling from the heavens. A priceless gemstone with a deadly curse. And a chunk of sandstone considered so sacred that wars have been fought to protect it. What is it about stones that inspires some people to worship them?

Could aliens have told Joan of Arc how to beat the English army? And could a US serviceman have received a message when he touched a spaceship? Experts investigate.

Lue Elizondo previously identified five observable characteristics of UFOs, dubbed the 'five observables'. But there is a so-called sixth observable Elizondo began to investigate - an invisible threat these craft may pose.

In 2008, witnesses in Needles, California, saw military helicopters carry away a glowing flying object. What was the government trying to hide? And could UFO clean-ups be common?

A cryptic journal sparks an unprecedented investigation into whether a UFO crashed at Roswell, NM in 1947. What actually crashed there? The US government claimed it was a weather balloon. Others spoke of alien bodies, and government intimidation.

Did Viking explorers Erik the Red and Leif the Lucky make it all the way across the Atlantic to America 500 years before Columbus? Josh Bernstein sails a Viking ship from Denmark to discover what made the Vikings such masterful mariners.

The list of military eyewitnesses describing strange and threatening unidentified craft in U.S airspace is growing. And now, a U.S. Navy radar operator has provided something more: actual coordinates where UFOS appeared and disappeared.

The Laginas are astounded to learn that on a trip to Arizona, Gary Drayton may have gotten to the bottom of one the biggest treasure mysteries, one that has resulted in countless deaths and disappearance for those obsessed with finding it.

A miraculous meteorite falling from the heavens. A priceless gemstone with a deadly curse. And a chunk of sandstone considered so sacred that wars have been fought to protect it. What is it about stones that inspires some people to worship them?