Why Intelligent Life in the Universe May Be Hidden with Isaac Arthur

Does intelligent alien life exist? Answering the question of are we alone has turned out to be a bit more difficult than was originally envisioned when SETI first began decades ago. At first it was a matter of looking for giant omnidirectional beacons blasting out high energy messages, much like what we saw in the movie contact. But as we’ve gone through the process of searching, it’s becoming evident that such a scenario was in a way wishful thinking. We have seen no such unambiguous beacons, and thinking on just why a civilization would expend massive amounts of energy on a signal has changed. It's very likely to be far more subtle than that, and that any intentional message would be beamed directly at us. But beacons aren’t the only game in town. Since the advent of SETI, other technosignatures beyond radio have been thought of. Now we can look for laser emissions, industrial chemicals in the atmospheres of exoplanets, Dyson swarms, and a host of other signatures that would tell us if there are alien civilizations out there. Where is intelligent life in the universe? John is joined with Isaac Arthur to discuss the Fermi paradox, to try and answer where all of the intelligent life is in the universe, and look at what possible techno signatures are most likely. Dyson spheres and Dyson swarms, von neumann probes, and machine civilizations. Is it all just a Simulation? with Isaac Arthur:    • Is it all just a Simulation? with Isaac Ar...   Envisioning Our Future with Isaac Arthur:    • Envisioning Our Future with Isaac Arthur   Science and Futurism with Isaac Arthur channel:    / @isaacarthursfia   Our Website: https://www.eventhorizonshow.com/ Our Patreon:   / eventhorizonshow   Our twitter:   / jmgeventhorizon   Our Instagram:   / jmgeventhorizon