I don't know why we still even debate the idea that life exists outside of Earth. It's silly to think we are the only living things in the vast universe which is so massive that human brains can barely fathom the enormity of it.
According to Penn State, we are probably the only intelligent life form with the abilities that we have.
just think of all the animals there are on earth. How many can use tools to really get things done.
now, think of all the animals that used to be here
now think about the billions of years it took for us to get here.
odds are that when we meet aliens, it's us finding them on their planet.