As JW's, we were taught that there is no way that there is life anywhere but here on earth.
I personally never bought into that completely. There are billions and billions of solar systems out there. I do believe that absolutely there is life on other planets. Is it intelligent? I don't know. I think there is plant life, I believe there are other planets capable of sustaining humans, with vegetation, water, air. Are there animals? I would think perhaps there are bug like creatures, maybe small animals. I do not find it that hard to believe. Is there actually intelligent life as we know it? Don't know. Aliens visiting our planet? I think unlikely.
I just would be suprised that with God creating earth, and having all that power, that he would settle on just one planet that would be life sustaining.
For those who do not believe in God, we got here somehow. Did lilfe come to exist just like us on other planets, solar systems? Would that not seem likely?