u/Random_person_x3

Everyone keeps asking if we are alone in this Universe, but isn't the answer way easier than we think? We know that the Universe is approximately 13.7 billion years old which means we can receive any signals in this range, so, given the fact we haven't received any it means we are truly alone, at least in the observable universe, but there's the unobservable one, so if there are other civilizations 14 billion light years away we still wouldn't hear from them for another 300 million years. For reference, the entire human lineage has existed for an average of 5 million years.