Only a fraction of the vast multidimensional parameter search space 🌌 has been explored so far —a situation compared to searching for a needle in a #cosmic haystack. Either #technoemissions are sufficiently rare that none has illuminated Earth during the 65 yr of #SETI searches, or they have indeed intersected our planet but have so far eluded detection. Should the current commitment to the search for life elsewhere persist, a discovery 📡 could be closer than ever https://iopscience.iop.org/article/10.3847/1538-3881/ae394b
Undetected Past Contacts with Technological Species: Implications for Technosignature Science

Undetected Past Contacts with Technological Species: Implications for Technosignature Science, Grimaldi, Claudio