Vast statues, towering obelisks and incredible temples formed the legacy left by the greatest Egyptian Emperor. Cutting-edge graphics recreate this golden empire.

Everything we know about UFOs has changed. The all-star team return to explore new developments and investigations.

An epic journey to the places that heard the word of St Paul and inspired the birth of Christianity.

A turbulent and violent geological past has led to the formation of this unique and beautiful waterway. The secrets and mysteries of Scotland's most famous loch are revealed.

Could extraterrestrials have left us clues to the universe's mysteries? Experts investigate cryptic puzzles that might have been left by ancient aliens.

Documentary series that reconstructs life on other planets and galaxies, fantasizes about life and all its possible forms in other atmospheres and parallel universe.

Discover the myth of ancient Greece's most feared god. Hades takes us behind the veil of the ancient Greek belief in life after death with chilling tales.

We reveal the mysteries of an area which has swallowed an untold number of ships, planes and lives.

Vast statues, towering obelisks and incredible temples formed the legacy left by the greatest Egyptian Emperor. Cutting-edge graphics recreate this golden empire.

Everything we know about UFOs has changed. The all-star team return to explore new developments and investigations.

An epic journey to the places that heard the word of St Paul and inspired the birth of Christianity.

A turbulent and violent geological past has led to the formation of this unique and beautiful waterway. The secrets and mysteries of Scotland's most famous loch are revealed.

Could extraterrestrials have left us clues to the universe's mysteries? Experts investigate cryptic puzzles that might have been left by ancient aliens.

Documentary series that reconstructs life on other planets and galaxies, fantasizes about life and all its possible forms in other atmospheres and parallel universe.

Discover the myth of ancient Greece's most feared god. Hades takes us behind the veil of the ancient Greek belief in life after death with chilling tales.

We reveal the mysteries of an area which has swallowed an untold number of ships, planes and lives.

Vast statues, towering obelisks and incredible temples formed the legacy left by the greatest Egyptian Emperor. Cutting-edge graphics recreate this golden empire.

Everything we know about UFOs has changed. The all-star team return to explore new developments and investigations.

An epic journey to the places that heard the word of St Paul and inspired the birth of Christianity.

A turbulent and violent geological past has led to the formation of this unique and beautiful waterway. The secrets and mysteries of Scotland's most famous loch are revealed.

Could extraterrestrials have left us clues to the universe's mysteries? Experts investigate cryptic puzzles that might have been left by ancient aliens.

Documentary series that reconstructs life on other planets and galaxies, fantasizes about life and all its possible forms in other atmospheres and parallel universe.

Discover the myth of ancient Greece's most feared god. Hades takes us behind the veil of the ancient Greek belief in life after death with chilling tales.

We reveal the mysteries of an area which has swallowed an untold number of ships, planes and lives.

Cutting-edge technology gives an insider's look at the subterranean city built within Churchill's secret bunkers during the Second World War.

Lue Elizondo uncovers an exclusive video, sparking an investigation into possible connections to the USSR - and the threat posed by UFOs to our planet.

Green Beret Terry Schappert examines history's greatest warriors. Discover how a defiant Saxon defence withstood the might of the Viking fleet at the Battle of Maldon.

The Marianas Trench is the deepest place on earth. Follow a mission into the abyss and explore the geology that has created this deep scar along the ocean floor.

It is a story told in more than twelve hundred cultures around the world: the gods sent a great flood to wipe out humanity for its disobedient and wicked ways.

They ruled over much of Europe and Asia during the Dark Ages, building stadiums, aqueducts and cathedrals. But the Byzantines' success became their downfall.

What would happen to Earth if all humans vanished? Outbreak examines the possibility of escaped animals, invasive vines and a deadly virus taking over control from humans.

Shocking footage reveals the horrors of the worst hurricane in US history, as well as the monstrous earthquake that claimed countless lives in Haiti.

Cutting-edge technology gives an insider's look at the subterranean city built within Churchill's secret bunkers during the Second World War.