Darwinian evolution and the problem of extraterrestrial life.
D000220:Adaptation, Biological; D000818:Animals; D005075:Biological Evolution; D001695:Biology / Q000266:history; D002591:Cetacea; D003469:Culture; D004289:Dolphins; D004463:Ecology; D005118:Extraterrestrial Environment; D005815:Genetic Code; D049672:History, 19th Century; D008394:Marsupialia; D009154:Mutation; D000069497:Origin of Life; D010788:Photosynthesis