Some of the strangest and deadliest weapons ever built were the prototypes of the modern gun. Was a simple bamboo tube the world's first hand gun? Plus, hidden in an ancient manuscript lies a secret recipe for ancient tracer fire – but does it work?

‘The Universe’ examines how we know what we do about space: Mars, black holes, and even if there is anywhere else out there that can sustain human life. This is the story of the scientists and explorers who dared to venture into uncharted territory.

Follow the team from UFO Magazine as they open their files and investigate UFO cases around the world.