No one knows that there is not life on other planets in our universe but the planets closest to us have no visible life so far. Some planets (like Neptune, Saturn, Jupiter and Uranus) are gas giants which means we most likely couldn't stand on them:) Technology is being made so that one day in the probably very near future we can build colonies on Mars.
Earth is the only planet known to have life and liquid water.
Actually not exactly... They think MARS can have life. They found WATER on mars, so, no, Earth might not be the only planet with life.
Because Earth is the only place where we can murder the English language and ask questions like, "Why life is possible only in earth not in other planets?"
Life formed on earth because the conditions were right for life to begin and evolve. While some think that life (as we know it) is only possible on our earth, others think that somewhere, in the vastness of the Universe, life on a similar planet to earth must exist.
Earth is a are home planet ,and the only planet that contains life
Earth
Only Earth.
LIFE.
earth
Earth
Only one planet has confirmed life: the Earth.
Currently, only planet earth in our solar system is known to harbor life. And life on earth is incredibly diverse..