PBS Space Time host Gabe Perez-Giz explores a few ways in which we might signal aliens in a recent episode of the series. Perez-Giz certainly seems to favor a kind of giant billboard announcing our presence.
Everyone has their own opinion as to whether or not aliens exist. But let’s assume they do for a second and we wanted to let them know we’re here!!!! How should we signal our species’ existence through the expanse of space? There are a few options, but which is the most effective and the cheapest?