I do know there is a continuous search for the answer if there is life on other planets. I do know it’s possible considering how enormous the Universe is. There is a high possibility of life existing outside our planet. There have been many studies and Earth is the only planet that supports human lives.
We don’t know that there isn’t life yet. It hasn’t been proven either way. Look at it this way, we live on a galaxy containing somewhere around 200 billion stars and theirs over 100 billion galaxys that we can actually see.
Earth is the only planet on this solar system that has a climate and environment that humans can live .The other planets have extreme temperatures which does not allow for anything to live on them from my point of view there’s just no way possible for life on other planets.
Im sure we will continue to search for new and improved way to find out other ways to explore the Universe and find life on other planets. Honestly there’s no way we could say definitely that there isn’t life on other planets it’s just that there isn’t any proof of it yet.
For a very long time people here on Earth believe they have seen aliens. There is not a lot of proof of this other than the idea of aliens being seen other than the few sightings which could be unreliable. The best lead as far as the planet Mars is that Scientist have studied Mars for a while and have come to a conclusion that Mars looks like it used to be able to support life though they have not yet spotted any evidence off life their yet.