> This could include unnatural-looking star arrangements, technosignatures in stars, etc. > New Physics. ("We wouldn't even know them if we saw them. They migh

> This could include unnatural-looking star arrangements, technosignatures in stars, etc. > New Physics. ("We wouldn't even know them if we saw them. They might be able to convert waste heat to matter, etc.") How do we even know what to look for? Why would we think that something we've only understood for 100-200 years is in any way a meaningful signature for billion year old civilizations? We might as well be looking for the presence of flint flakes. That at least was state of the art technology for thousands of years.