Sky History 2 Sunday

Experts investigate whether alien life forms are thriving in Earth's seas, following Russian cosmonauts' discovery of living plankton in space

Theorists explore world mythology as they investigate whether extraterrestrials could be responsible for mankind's existence

Experts question whether the facts of Earth's alien past could be buried in areas that - thanks to warfare or instability - are presently off-limits to exploration

Garth Barnard investigates the Baker's Creek aviation disaster in Australia in 1943, when 40 American servicemen were killed when their B-17 bomber aircraft crashed

With the East Coast adventure slowly coming to an end Peter and Elroy contemplate what they have found and learned throughout the journey, as a new plan starts to form

A look at a theory that suggests aliens may have colonised an ice-free Antarctica, before a global event plunged it into the Ice Age

Through history, mankind has credited its existence to otherworldly beings. This programme contemplates whether any proof can be found in these early beliefs

Recounting how on the outskirts of Bouerat Harbor in Libya, a small group of British special forces made plans to destroy a crucial German fuel depot

Roman dodecahedrons and baffling copper scrolls discovered in Israel come under the microscope next. Plus, a bizarre discovery in Whitby

Beau Ouimette and Rick Edwards visit the River Trent near Newark Castle, site of one of the greatest strongholds of the English Civil War

Beau Ouimette and Rick Edwards visit Hadrian's Wall, where they scour the River Eden and River Carlisle for lost evidence of the Romans' brutal occupation of Britain

Alice Roberts investigates the best archaeological discoveries of 2018 from the West of the UK, including the biggest maritime excavation since the Mary Rose

Alice Roberts investigates best archaeological discoveries of 2018 from the East of the UK, including an ancient lost monument as old as Stonehenge uncovered in Suffolk

The story continues with a look at his time as prime minister, a period where his notable speeches were born

Experts examine strange stone structures on New England and New York's landscapes, contemplating whether they offer clues of alien visitors to Earth

Serpent gods are found in many religious texts, but could these stories be describing reptile-like extraterrestrials, and are they still here today?

Actor Laurence Fishburne explores the fate of TWA Flight 800, a Boeing 747-100 that exploded and crashed into the Atlantic Ocean near East Moriches, New York, in July 1996

The 11-day Ruby Ridge standoff of August 1992, which followed efforts by Idaho authorities to apprehend and arrest alleged white supremacist Randy Weaver

Experts question whether the facts of Earth's alien past could be buried in areas that - thanks to warfare or instability - are presently off-limits to exploration

A look at a theory that suggests aliens may have colonised an ice-free Antarctica, before a global event plunged it into the Ice Age

Through history, mankind has credited its existence to otherworldly beings. This programme contemplates whether any proof can be found in these early beliefs

A look at some of the most notable catastrophes in history, from the Hindenburg disaster to the Wall Street Crash and China's Cultural Revolution

The events of June 1941, when cameras rolled as Nazi Germany launched an all-out assault on the Soviet Union

Experts examine strange stone structures on New England and New York's landscapes, contemplating whether they offer clues of alien visitors to Earth

Ancient Astronaut theorists examine the creation myth of the 'Cosmic Egg', and look at why the concept is so pervasive throughout the world