Is there alien life out there

Do you believe that there may be other forms of sentient life on other planets.

Is there other solar systems , galaxies & or universes out there that might contain sentient beings.

I believe there are other lieforms out there in the great unknown , this universe is so big and ther are more planets out there than we can ever imagine , do you really think that this earth is the only planet that can sustain sentient life.