How did the planet evolve to support life? Earth now sustains a huge assortment of living creatures requiring very special conditions, but how did this unique arrangement come about? What did it take to make a world that would support human life? Naked Science goes on a journey back to the moment this solar system was formed. Fast forwarding to today, scientists carry out unique detective work to uncover clues around the globe into what the planet was like four and a half billion years ago.