Sky History 2 Tuesday

Giorgio Tsoukalos and David Childress explore the mysterious chain of man-made islets in Micronesia's Nan Madol

A weather balloon said to have outside Roswell in 1947, which may have actually been alien in nature

How, in Siberia, a 44,000-year-old wolf, perfectly preserved in permafrost, may hold secrets about Ice Age bacteria and ancient microbial life

The Republic P-47 Thunderbolt, a Second World War-era fighter aircraft produced by the American company Republic Aviation from 1941 until 1945

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

Giorgio Tsoukalos and David Childress explore the mysterious chain of man-made islets in Micronesia's Nan Madol

A weather balloon said to have outside Roswell in 1947, which may have actually been alien in nature

The hunt begins in the Hell Creek Formation of South Dakota, with one of the greatest palaeontology discoveries ever made

Dan Jones explores the turbulent history of Lancaster Castle, which has witnessed scenes of historical, cultural and political significance throughout the centuries

The beauty of Notre-Dame de Paris, which acts as an icon of French culture and its history while also attracting the attention of many tourists and aesthetes

The Republic P-47 Thunderbolt, a Second World War-era fighter aircraft produced by the American company Republic Aviation from 1941 until 1945

A Turkish drought reveals a long-lost ancient Basilica and its secrets, while a church spire punches through the surface of a toxic sludge in Romania

A look at the working conditions of a miner in Indonesia, a visit to the Petrifying Well in England and a tour of a village where the houses are simply holes in the ground

Experts scrutinise the engineering behind the Egyptians' Sphinx and pyramids, questioning whether extra-terrestrial help was utilised to complete the structures

A look at how each Axis Power had troubles on their own home front, leading to disaster in the final days of the Second World War

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

How, in Siberia, a 44,000-year-old wolf, perfectly preserved in permafrost, may hold secrets about Ice Age bacteria and ancient microbial life

Part two of two. Archaeologists investigate the truth behind key moments that took Caesar to the brink of defeat in his pursuit of power

Giorgio Tsoukalos and David Childress explore the mysterious chain of man-made islets in Micronesia's Nan Madol

A weather balloon said to have outside Roswell in 1947, which may have actually been alien in nature

Dan Jones explores the turbulent history of Lancaster Castle, which has witnessed scenes of historical, cultural and political significance throughout the centuries

Technologies, restorations and excavations reveal the secrets of the construction of the Holy Sepulchre of Jerusalem, the most sacred Christian site in the world

Experts scrutinise the engineering behind the Egyptians' Sphinx and pyramids, questioning whether extra-terrestrial help was utilised to complete the structures

A Turkish drought reveals a long-lost ancient Basilica and its secrets, while a church spire punches through the surface of a toxic sludge in Romania

Chile has the highest number of UFO sightings of anywhere on Earth. Here, incredible footage of a strange craft has people asking again about the reasons why