Sky History 2 Friday

Investigating cosmism - a belief that human civilization originated in the cosmos. This train of thought is widely held throughout Russia

The US military has denied that the infamous 1947 Roswell crash was anything other than a weather balloon, but FBI files include a memo to J Edgar Hoover

An examination of a video showing a strange formation of flickering lights. Plus, a mysterious humanoid creature caught on camera in an abandoned attic

Delving deep into museums, laboratories and storage rooms, a look at some of the most perplexing and unusual artefacts from ancient and modern history

Operation Husky, a massive amphibious invasion of the island of Sicily carried out by Allied Forces in July 1943

Theorists search ancient texts for proof that extraterrestrials influenced the miraculous advances made by the Sumerian civilisation 5,000 years ago

Experts investigate stories of a French church that supposedly contains a gateway to another universe and an alien library believed to be hidden underneath the Great Sphinx of Giza

Rick Edwards and Beau Ouimette embark on an epic search through the River Ouse in Yorkshire, in a bid to find evidence of Viking life

Alice Roberts witnesses the uncovering of a Roman mosaic on farmland in Rutland, and visits the site of a saintly hermit's hovel discovered in the Lincolnshire fens

An expedition investigates controversial evidence that might confirm a history of sea monster sightings off the coast of Florida

In the Pacific Northwest, an investigative team searches for evidence of an ape-like beast that is rumoured to steal children

Delving deep into museums, laboratories and storage rooms, a look at some of the most perplexing and unusual artefacts from ancient and modern history

A mysterious sea beast seen from the shore of a small seaside town in the UK. Plus, the notion that a field of massive mysterious jars were made by giants

The Battle of Kursk, an engagement between German and Soviet forces on the Eastern Front near Kursk, roughly 280 miles south west of Moscow, during July and August 1943

Between December 1941 and May 1942, Singapore fell, the Wannsee Conference was held in Berlin and a single event in the Pacific transformed the war into a total global conflict

How UFO sightings has been analysed and discussed at the highest levels of government in the UK, the United States and the former Soviet Union

The Munich air crash of 1958, when a flight carrying the Manchester United football team crashed on its third attempt to take off from a slush-covered runway

A hypothetical look at what might happen to the Earth's metallic objects, such as bridges, buildings and gold reserves, if humans ceased to exist

Theorists search ancient texts for proof that extraterrestrials influenced the miraculous advances made by the Sumerian civilisation 5,000 years ago

Experts investigate stories of a French church that supposedly contains a gateway to another universe and an alien library believed to be hidden underneath the Great Sphinx of Giza

Alice Roberts witnesses the uncovering of a Roman mosaic on farmland in Rutland, and visits the site of a saintly hermit's hovel discovered in the Lincolnshire fens

Beau Ouimette and Rick Edwards search the River Tees, searching for lost Tudor relics from a gruesome 16th-century siege at Barnard Castle and secrets of this ancient borderland

In the world without humans, pythons compete with alligators for control of the Florida Everglades, and Shanghai is sunk by its empty skyscrapers

The Munich air crash of 1958, when a flight carrying the Manchester United football team crashed on its third attempt to take off from a slush-covered runway

The programme contemplates the possibility of the first astronauts reaching Mars in the next 20 years, and wonders if there is evidence to suggest human life was first seeded there