Regarding the passage on p. 163 of the 'Gleanings': The creatures which Bahá'u'lláh states to be found on every planet cannot be considered to be necessarily similar or different from human beings on this earth. Bahá'u'lláh does not specifically state whether such creatures are like or unlike us. He simply refers to the fact that there are creatures on every planet. It remains for science to discover one day the exact nature of these creatures.