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

Ancient astronaut theorists suggest that extraterrestrials designed the human body to be a vessel for otherworldly entities

Treblinka, Majdanek and Sobibor, the camps used in Operation Reinhardt, a murder campaign in which the Nazis murdered almost two million people over two months in 1942 and 1943

Guns increasingly shaped the way battles were fought and borders were drawn. With time, the quest to create more innovative weapons became ever more contested

How codes and ciphers have been used for millennia to send secret messages, hide identities and operate outside the law

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

Ancient astronaut theorists suggest that extraterrestrials designed the human body to be a vessel for otherworldly entities

Experts explore the similarities between huge pyramids across the world, and hypothesise on whether extraterrestrials could have influenced their construction and design

Ancient astronaut theorists hunt for evidence linking Bigfoot to alien species from the distant past, and ask whether the giant ape-like creature could be an extraterrestrial

Ancient astronaut experts examine whether the minds of Einstein and Galileo could have been superhuman and explore extraterrestrial connections with the historical figures

Suggestions of cover-ups over the fact extraterrestrials with a superior knowledge of science and engineering landed on Earth thousands of years ago

Giorgio Tsoukalos draws on evidence from past series as he asks whether extra-terrestrials could have introduced the Greeks and Egyptians to electricity

An examination of a recent caught-on-camera sighting of Chupacabra outside an Amarillo Zoo. Plus, whether a photograph taken over Costa Rica the greatest UFO picture ever taken

Guns increasingly shaped the way battles were fought and borders were drawn. With time, the quest to create more innovative weapons became ever more contested

How codes and ciphers have been used for millennia to send secret messages, hide identities and operate outside the law

Science shines a light on the dark side of Ancient Egypt, from a 5,000-year-old homicide to drug-fuelled debauchery - and one very shocking revelation

The truth and lies behind ancient Egypt's best-known and loved icons, including the Great Sphinx, Tutankhamun, and the lost city of Tanis

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

Ancient astronaut theorists suggest that extraterrestrials designed the human body to be a vessel for otherworldly entities

An investigation into the Ark of the Covenant, one of the most sought after religious relics of all time with powers that may suggest a link to an extraterrestrial past

The team goes on the hunt for the Morda Workhouse in Oswestry, Shropshire, and searches for evidence of what life was really like for the poor who ended up there

Alice Roberts joins archaeologists on digs of northern Britain, revealing a Roman Emperor's lost bath house, and the sunken treasures of medieval pilgrims

Cameras capture an important urban centre that is sinking towards oblivion, sprawling ruins buried under Saharan sands and a ghost town on the edge of the Gobi Desert

Scott and Sheldon discover a train bell potentially from the famous crash that killed Jumbo the elephant in the late 1800s

The cases of people who have reported being abducted by aliens. They even include one-time Republic of Kalmykia president, Kirsan Ilyumzhinov