Sky History 2 Wednesday

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

To enter space, humans require a space suit. Are the aliens that are said to have visited Earth any different, or are they more akin to artificial drones?

In the spring of 1952, reports of UFO sightings rose significantly. Former US Air Officials attempt to shed light on the possible causes

Dan Jones explores the history of the Welsh capital's landmark, Cardiff Castle, and discovers more about its various incarnations over the centuries

Hugh Dennis and a team of expert archaeologists are in the market town of Masham in North Yorkshire, hoping to find a Viking burial ground hidden underneath

Allen Haff and Ton Jones endure disappointment at an auction, but hope a container they have secured at another site will make their day worthwhile

Storage auction enthusiasts in Fort Lauderdale, Florida, are not pleased when Allen Haff and Ton Jones arrive in town searching for bargains

The story of one of the Viking longship. Its design evolved from swift war canoe to versatile and feared ship, changing the course of history