There’s something called the Drake equation that hypothesises whether there is other intelligent life out in the universe. I don’t know it and can’t quote it, but I looked it up (see above). The fact that the scientists have even found amino acids in space (the building blocks of life) means that there are possibilities of finding other beings.

The equation looks at how many possible inhabitable planets are out there, whether life could evolve, and whether intelligent life might come about. Then you have to think about time. If an intelligent life form was to exist somewhere else they might send out signals, but it could take millions or billions of years to travel across space before we detected it, and by then they could be long gone. So it would only be possible to communicate if they were closer, tens of years away? But then a conversation with someone even twenty light years away (the distance of a possible habitable planet) would be very boring. One question every forty years, one reply eafter another forty years. And space travel would only be possible at a small percentage of the speed of light, according to the laws of physics. So we might be able to talk but not visit.

It might be great to get a signal, but even if there are other civilisations it doesn’t mean we will ever find out.