Are we alone?

In my opinion, I do not think that we are alone in the universe. The reason that I think we are not alone in the universe is that the universe is just too big and has too many galaxies and different planets. Earth can’t be the only planet that has the necessities to sustain life. Although the necessities may be different for the planets there is a huge possibility that there are different types of life forms in other universes and planets. There is still a lot that is not known about space and even our own planet because only 4% of our oceans have been explored because our technology is not advanced enough to dive deeper down just as it is not advanced enough to go out deep into space.