Alien Life: The Search For Extraterrestrials And Beyond
"Parker has done an outstanding job of pulling together the current scientific understanding of life on Earth and the possibilities of life elsewhere."--Christopher P. McKay, Research Scientist, NASA Ames Research Center
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Life maybe very ordinary since we can see it everywhere.But if we try to dig deeper about it,it is just so hard and complicated.And the universe is really big and no doubt that the extraterrestrial life exists.Maybe they even contribute in the making of life in earth.