Sky History 2 Sunday

Throughout history, there have been stories of strange beings unlike anything known to exist on Earth This programme examines whether they could be more than just mythology

From octopuses that can edit their DNA to jellyfish that can live for ever, this edition considers whether such unusual creatures were delivered to Earth by aliens

Spanish Conquistadors obliterated the Mayan people's history. Here, experts investigate whether they may have erased proof of extraterrestrial visitors

The story of two marijuana advocates Tom Crosslin and Rolland Rohm, who were gunned down by the FBI after a five-day standoff in August 2001

Strange markings in the remote reaches of Northern Finland, a Manhattan-sized mystery in the depths of a Vietnamese cave and a lost sky-high world in Mozambique

Throughout history, there have been stories of strange beings unlike anything known to exist on Earth This programme examines whether they could be more than just mythology

From octopuses that can edit their DNA to jellyfish that can live for ever, this edition considers whether such unusual creatures were delivered to Earth by aliens

The first Emperor of China Qin Shi Huang, who rests in a tomb so large that the archaeological dig could last a century

The English did not warmly welcome their Viking visitors and conflict appears to have been common. There is dramatic evidence for this at a site called Ridgeway in Dorset

The Cambodian Civil War, which was contested between 1967 and 1975. The struggle was complicated by the influence and actions of the allies of the two warring sides

Perplexing historical objects include the Jericho Head, a 9,000-year-old clay-covered artifact. Plus, a 1950s machine built to control the weather

The first Emperor of China Qin Shi Huang, who rests in a tomb so large that the archaeological dig could last a century

The English did not warmly welcome their Viking visitors and conflict appears to have been common. There is dramatic evidence for this at a site called Ridgeway in Dorset

The Cambodian Civil War, which was contested between 1967 and 1975. The struggle was complicated by the influence and actions of the allies of the two warring sides

Investigating the possibility of time travel, with experts discussing new evidence suggesting that this phenomenon of science fiction might not be as far-fetched as it seems

A look at the places Hitler and members of his inner circle could have fled to, should the theories about them surviving the fall of Berlin be valid

Experts examine the plausibility of the Egyptian prophecy about the impact of a comet causing unimaginable destruction in 2012

A diamond with a sinister past, the bones of a world-famous bard, and a beach covered in 'cursed' stones

A dog-walker who spotted a large cylindrical object hovering in the sky, and schoolchildren in Florida who claim to have witnessed multiple UFOs

Two patrol cops in Ohio spot a strange bright light flying through the night sky, and are given orders to pursue the object, triggering a large-scale car chase

Throughout history, there have been stories of strange beings unlike anything known to exist on Earth This programme examines whether they could be more than just mythology

From octopuses that can edit their DNA to jellyfish that can live for ever, this edition considers whether such unusual creatures were delivered to Earth by aliens

Spanish Conquistadors obliterated the Mayan people's history. Here, experts investigate whether they may have erased proof of extraterrestrial visitors

How, for some covert missions, assassination is the goal, with lethal toxins deployed by spy agencies to kill perceived foes

Perplexing historical objects include the Jericho Head, a 9,000-year-old clay-covered artifact. Plus, a 1950s machine built to control the weather

The fascinating story behind the Mosquito, the stunning wooden aircraft that undertook some of the most daring and iconic raids of the Second World War

Archaeologists and anthropologists make discoveries that receive little notice because they fail to fit into the accepted scientific paradigm