Over the years I have seen countless articles and discussions that tackle the likelihood of finding alien intelligence(s) in the Universe.
The argument is often set out like this: considering the sheer scale of the Universe, any alien civilization would likely be so remote that communication would be difficult and physical interaction impossible. That, of course, assumes that any alien technology is comparable to ours.
The discussions often go on to explain that the Universe is over 13 billion years old and so it highly probable that other civilizations have had plenty of time to evolve and develop new technology.
This conjecture is all very interesting, but in some respects a little flawed.
ANALYSIS: Crowd-Funded Radio Beacon Will Message Aliens
If I was pressed on expressing my opinion, I would certainly support the concept of a Universe where humans are not alone. However, it is also possible that we are amongst the first to emerge with any level of intelligence and technology. It may just be that our alien cousins haven't had as long to evolve as you might think.