bookafnd apžvelgė autoriaus Isaac Asimov knygą Extraterrestrial Civilizations
dated, but reasonably good
4 žvaigždutės
it's essentially a long exploration of the drake equation. being from 1979, the science is a bit out of date—for example, there were no confirmed exoplanets at the time. it seems to mostly hold up, though (to me, someone who is Very Not an astrophysicist).