<prompt> Translate the following text to EnglishDawkins mwenyewe anasema kwamba baada ya miongo mingi ya kutafuta, wanasayansi hawajapata uthibitisho wowote wenye kusadikisha kwamba kuna uhai mahali pengine katika ulimwengu.  <response>: Dawkins himself notes that after decades of searching, scientists have found no conclusive evidence that life exists elsewhere in the universe. 