+ carbon-cycle  (1) + embryonic-interstellar...  (1) + end-of-world-and-armag...  (1) + endosymbiosis  (1) + equivalence-principle  (1) + ethics-of-space-travel  (1) + genome-evolution  (1) + gravity-on-spaceships  (1) + gynoid  (1) + imported  (2)