Listening to alien messages poses an extinction risk if grabby civilizations are sending them. This means that the search for extraterrestrial intelligence, particularly passive SETI, needs to be approached with caution. ▀▀▀▀▀▀▀▀▀PATREON, MEMBERSHIP, KO-FI▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ 🟠 Patreon: ...

Thank you to Squarespace for supporting PBS. Go to ​https://www.squarespace.com/pbs for a free trial, and when you are ready to launch, go to Squarespace.com/PBS to save 10% off your first purchase of a website or domain. PBS Member Stations rely on viewers like you. To support your local ...

In the previous video, we talked about why humanity seems to have appeared very early in the universe: among the first civilizations that could ever appear. Earliness constitutes a riddle. It makes humanity’s situation seem rather mysterious. Robin Hanson, who introduced the idea of the great ...