Sky History 2 Tuesday

Experts check out structures built to mirror the constellations, contemplating whether they may have been built as a message to send to extraterrestrials

Ever since the first atomic bomb went off in 1945, UFOs have been spotted at nuclear facilities across the world. Experts wonder if this presence could be a threat to mankind

Mysterious industrial waste and abandoned homes are discovered in a remote part of Greenland. In Norway, strange ditches and huge mounds are found within the Arctic Circle

The B-24 Liberator, which was used extensively in the Second World War where it served in every branch of the American-armed forces, as well as several Allied air forces and navies

An eye-opening journey investigating the startling mysteries captured by satellites orbiting the Earth - from hidden worlds to unexplainable natural phenomena

Experts check out structures built to mirror the constellations, contemplating whether they may have been built as a message to send to extraterrestrials

Ever since the first atomic bomb went off in 1945, UFOs have been spotted at nuclear facilities across the world. Experts wonder if this presence could be a threat to mankind

Professor Alice Roberts looks at the rise of one of history's greatest civilisations, the Roman Empire, assessing the secret to its success

Dan Jones explores the history of Carrickfergus Castle in Co Antrim, a stronghold key to understanding the relationship between Britain and Ireland

The story behind the breath-taking temple complex Angkor Wat, which is located in Cambodia and is the largest religious monument in the world

The B-24 Liberator, which was used extensively in the Second World War where it served in every branch of the American-armed forces, as well as several Allied air forces and navies

A case involving a radio distress call from a seven-year-old boy lost alone in the desert. As the hunt continued, the case became more and more mysterious

Visits to worldwide regions that boast something unusual and worthy of note

Reported accounts of alien encounters, hearing from people who believe that beings from other worlds have the means to control humanity

Victory in war doesn't just require sound military strategy, vital resources and equipment are also critical. The episode explores how the Axis powers failed in this regard

The world's most enigmatic unsolved mysteries, questioning long-held beliefs about central figures and momentous events in the modern and ancient world

Mysterious industrial waste and abandoned homes are discovered in a remote part of Greenland. In Norway, strange ditches and huge mounds are found within the Arctic Circle

Part one of two. Archaeologists investigate the full story of how the most famous Roman leader, Julius Caesar, rose to power and the battle that took him to the brink of defeat

Experts check out structures built to mirror the constellations, contemplating whether they may have been built as a message to send to extraterrestrials

Ever since the first atomic bomb went off in 1945, UFOs have been spotted at nuclear facilities across the world. Experts wonder if this presence could be a threat to mankind

Dan Jones explores the history of Carrickfergus Castle in Co Antrim, a stronghold key to understanding the relationship between Britain and Ireland

Examining how oil was obtained from the ground without modern drills, and how a bridge was built across the Rhine in just 10 days

Reported accounts of alien encounters, hearing from people who believe that beings from other worlds have the means to control humanity

A case involving a radio distress call from a seven-year-old boy lost alone in the desert. As the hunt continued, the case became more and more mysterious

Experts investigate an Italian mountain that has stood witness to inexplicable phenomena for centuries, wondering whether it could somehow be attracting alien visitors