Sky History 2 Saturday

Experts investigate whether the US military has a secret space programme, as well as evidence suggesting alien races have been in conflict for millennia

Specialists in the field of the extraterrestrial study evidence across 75 million years to validate the theory that there has been extraterrestrial intervention on Earth

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

The actor examines the Piper Alpha oil platform explosion of July 1988, one of the most devastating man-made catastrophes to date, in which 167 workers died

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

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