We have contemplated what it would mean for us to detect non-human communication. It should be from a narrow bandwidth (potentially something like the length of hydrogen frequency of 1420 mhz), show little background noise, be directed from an identifiable source, and most importantly IMHO, verified from multiple witnesses at different times. I'm no expert, so please correct me if you disagree. My question is this - would it be likely that an alien species within our radio wave bubble would be able to determine that sentient life exists on our planet? submitted by /u/No_Plum6844 [link] [comments]