The topic of radio communication is in my view a very narrow chance of finding some folks out there who use radio exactly the same time our signals arrive at them, or their signals were sent at a time where it arrives to us the right time where we have developed radio communication or are at a pace where we still use this "slow" nad inefficient communication.<br><br>Relative to the time where there are planets capable of being a place for life as we know until lets say now 8-10 Billion years the window for radio technology is very narrow.<br>There surely are some who fit in this tiny window. But most of them are either to early or much more advance for this "primitive" tech.<br>That makes it even harder to find a fitting second or third radio using species out there.<br><br><br>The Fermi-Paradox is not that of a paradox in my view!