Sky History 2 Saturday

Satellite images have revealed a giant face that appears to be carved into the Earth in Alberta, Canada, which has now become known as 'The Badlands Guardian'

Physicist Bob Lazar, who says he was hired to reverse-engineer an alien spacecraft by the US government, with a fuel source that had the power to change the world

How women were active and often violent participants and perpetrators in the Second World War and its attendant atrocities - especially the Holocaust

The experiences of Paul Bennewitz, who crossed the US military after believing he had found a top secret human and alien underground lab in Dulce, New Mexico near Los Alamos

A grim discovery in a Swedish lake reveals shocking ancient practices and the fossil of a previously unknown mammal is found in the Canadian Arctic

Throughout history, there have been stories of strange beings unlike anything known to exist on Earth This programme examines whether they could be more than just mythology