Life in space.
D000818:Animals; D055580:Astronomical Phenomena; D001256:Astronomy; D001669:Biochemical Phenomena; D001671:Biochemistry; D005075:Biological Evolution; D001695:Biology; D005118:Extraterrestrial Environment; D005502:Food; D006801:Humans; D007360:Intelligence; D010684:Philosophy; D011835:Radiation Protection; D013026:Space Flight; D013472:Sunlight; D013696:Temperature