1. Throughout the whole life, we need to across many obstacles and we don't know how difficult the life origin is.
2. People always think evolution is the path to wise lives, but what makes us human is the result of too many miracles stacking.
3. There is only one currently known planet with life and that is Earth.
4. But I believe, with the progress of the times, we can find another planet with life and embark on it some day in the future. It is called "X" Planet.