Ditto if the strong filter is technological civilization (which strikes me as unlikely, given the anthropological record, but it is one of the Drake terms). If there are ten thousand intelligent species in the galaxy but we’re the only one advanced enough to be emitting on radio wavelengths, we’d never hear about any of the others.
Ditto if the strong filter is technological civilization (which strikes me as unlikely, given the anthropological record, but it is one of the Drake terms). If there are ten thousand intelligent species in the galaxy but we’re the only one advanced enough to be emitting on radio wavelengths, we’d never hear about any of the others.