Seth Shostak, a top astronomer at SETI has recently suggested that instead of trying to listen for standard transmissions from advanced alien biological lifeforms like ourselves, we should probably be listening for AI transmissions. This is based on our own experience, we as humans developed radio transmissions only a short while ago, considering the length of time our civilization has been advancing. And if we're any indication of the general route technologically capable life evolves, the galaxy is probably full of sentient AI collectives, not biological lifeforms. In an interview with the BBC, Dr Shostak said:"If you look at the...