title: Newsmaker interview. Imponderables complicate hunt for intelligent life beyond Earth. Interview by Yudhijit Bhattacharjee.
authors.forename: Paul
authors.initials: P
authors.lastname: Davies
mesh_terms: D018559:Exobiology; D005118:Extraterrestrial Environment; D007360:Intelligence; D019369:Life; D055609:Stars, Celestial