But why would they leave the same artifacts over and over again? Seems like a pretty boring existence for a "god". We've got blackholes, magnetars, pulsars, bin

But why would they leave the same artifacts over and over again? Seems like a pretty boring existence for a "god". We've got blackholes, magnetars, pulsars, binary stars... and... that's about it... Seems much more likely these structures are the end result of some fixed set of physical rules than insane gods trapsing around the universe. Also agreeing with one of the comments above about how mind bogglingly massive space is, we've been effectively "listening" to space for only about 100 years, which creates an effective "listening sphere" of 4.188×10E6 light years^3, or 0.000524% of the milkyway's EIGHT TRILLION cubic lightyears in size (even if we could listen to all directions simultaneously, which we can't!) I mean, we've been listening to the Wow! area for 50 years now, which also hampers the kind of electromagnetic 'sweep' we could possible be doing in the meanwhile. My overall opinion is that it's just simple not been enough time of listening. Actually this idea seems quite interesting, it would be cool to do the calculus to figure out our effective "increase" in contact intersection as each consective second, minute, hour, day, and year goes by as we "listen" to space. Infinite overlapping spheres in an infinite 3D space... hmmmm