Sky History 2 TV Guide

A look into lingering rumors that advanced military aircraft, such as the SR-71 Blackbird and B-2 Spirit Bomber, were designed from reverse engineered alien technology

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

Alice Roberts visits the south of England, discovering Britain's oldest shoe through a popular form of archaeology - mud larking. While in Kent, Alice visits a dig where one of the largest and oldest stone hand axes in the UK has been uncovered. Another archaeological dig reveals Henry V's lost shipyard on the south coast, and in Dover, Alice learns about top-secret Second World War defences from Jon Barker as he investigates the formerly classified weapons as well as the site where they were found at

Visits to the most remote, cold and inhospitable places on the planet to reveal great mysteries that have been frozen in time. In a Danish bog, hundreds of mutilated ancient bones are found, a mysterious deserted island belonging to Russia is explored, while massive, strange patterns on the ground are discovered in northern Kazakhstan

Sheldon spots a solid brass ship wheel on his hunt for collectibles, while Scott meets a local picking legend whose wild collection includes an erotic powder horn

Investigations into the possibility that extraterrestrials with a superior knowledge of science and engineering landed on Earth thousands of years ago

Theorists speculate about the existence of black holes on Earth, which may explain strange disappearances and other inexplicable phenomena

The development of the original form of combat - melee. Over time, short-range instruments of battle have evolved, from the short sword to Exoskeletons

In 1943, Germany fell at Stalingrad, its first major defeat. In the Pacific, Japan lost momentum after the US won at Guadalcanal

How an encrypted German telegram offered the key to saving Britain in its darkest hour. A team of geniuses set about decoding the message to help win the Great War

Investigations into the possibility that extraterrestrials with a superior knowledge of science and engineering landed on Earth thousands of years ago

Theorists speculate about the existence of black holes on Earth, which may explain strange disappearances and other inexplicable phenomena

Experts scrutinise the paintings, journals and technical drawings of Leonardo Da Vinci to establish whether they hide evidence of extra-terrestrial beings

Investigators around the world explore the possibilty that extraterrestrials have influenced mankind throughout the course of human history. Scientists explore the possibility that sightings of alien beings or UFOs may be evidence of time travellers from the future

Theorists investigate a depiction of a stegosaurus found at Angkor Wat in Cambodia, comtemplating whether it suggest that alien species killed off the dinosaurs

A team of scientists examines the remains of the Puma Punku temple in Bolivia in a bid to determine whether it could have been designed and constructed by extraterrestrials

A team of experts looks into the Orion constellation to investigate whether this could have been an entry point for aliens visiting Earth