This landmark series explores the greatest set of journeys humankind has ever taken, on a quest to answer the deepest of questions: where do we come from? How was the solar system formed? Are we alone in the universe?
Mars is one of the best-explored places in the solar system and yet we still don't know the answer to the big question: is there or was there life on Mars?
Jupiter is big, very dangerous and has moons as big as planets, but the more we learn we must conclude this giant is less of a planet and more of a failed star.
For centuries, humans imagined Venus to be a tropical paradise, but in reality its clouds are full of acid and the temperature is the same even at the poles.
Embark on a grand tour of the solar system, unravelling secrets that the planets have harboured for millions of years and discover that Earth almost never existed at all.