Examines unidentified objects witnessed by military pilots, extraterrestrial probes flying through the solar system, and a potential alien home world that may be hidden in the darkness of space.

Examines the ways that humans are preparing to become extraterrestrials, and how people will survive this trip into the unknown, as the human race makes plans to travel beyond the Moon to new worlds.

The blue marble called Earth remains in large part a mystery to the 8 billion people who live on it. Experts examine how Earth came to exist, the secrets of its survival, and guess at how long humans will be able to call it home.

For centuries, people have been fascinated by Earth's nearest planetary neighbour, Venus, and its shimmering appearance in the night sky.

From asteroids and bursts of radiation to microscopic alien viruses, each one of these cosmic dangers may end human civilisation as we know it.

Humans want to go into uncharted territories to make discoveries. As the next era of space exploration begins, what will humans find on other planets, and what dangers will we face when trying to conquer new frontiers?