How come life has yet to be found somewhere else?
Oh, Christian, by the way.
Good question. There are several reasons. First there would need to be a habitable planet with an intelligent enough alien life form that is capable of space travel. Okay, not necessarily too hard to find.
Another problem is distances. The distances between stars out there in the universe are enormous. You would need to have a spaceship capable of velocities near light speed. (Roughly 300 000 kilometers per
second.) Even at those speeds it would take hundreds, thousands or even millions of years for them to fly here.
Then comes the main problem. How slow light actually travels. Yes. Slow. Right now when we look at the night sky we see stars. We see those stars as they were millions or billions of years ago. One of those stars could have exploded 50 million years ago and we could still see the light coming from it. When an alien race out there takes a look at Earth (Another big problem, we are just one planet of many and there is no reason to look at us.) they see Earth as it was millions or billions of years ago. Barren. Lifeless. The aliens have no reason to specifically come to Earth when there are millions of identical barren lifeless planets everywhere.