What if the Aliens are in the next iteration of the penrose universe, and they communicate backwards in time using molectular technology, that when ingested, it changes the frequency of the brain to recieve the informatiom they're sending..<br><br>Stuart Hameroff said that substances like DMT quite literally alter the gamma frequency of the microtubules by latching onto them in specific areas...........<br><br>We have the technology already......... Its plant based.<br><br>Other than that, I think that certain black holes may be the boundaries to the previous iteration of the universe, and any sufficiently advanced civilisation from that universe, that sent signals should be able to be picked up by listening to them. ie, point telescopes at the black hole at the middle of our galaxy, and start listening for signals there.<br><br>In anycase, if we havent got the right tech, we'll never hear them.