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@Article{Davies:2007:BAA, author = "Paul Davies", title = "Biology: Are Aliens Among Us?", journal = j-SCI-AMER, volume = "297", number = "6", pages = "62--69", month = dec, year = "2007", CODEN = "SCAMAC", DOI = "https://doi.org/10.1038/scientificamerican1207-62", ISSN = "0036-8733 (print), 1946-7087 (electronic)", ISSN-L = "0036-8733", bibdate = "Fri May 17 10:29:26 MDT 2013", bibsource = "http://www.math.utah.edu/pub/tex/bib/sciam2000.bib", URL = "http://www.nature.com/scientificamerican/journal/v297/n6/full/scientificamerican1207-62.html; http://www.nature.com/scientificamerican/journal/v297/n6/pdf/scientificamerican1207-62.pdf", acknowledgement = ack-nhfb, fjournal = "Scientific American", journal-URL = "http://www.nature.com/scientificamerican", }