title: Chemical studies on the existence of extraterrestrial life.
abstract: Although the search for extraterrestrial intelligence has not produced any direct evidence of extraterrestrial life, the emergence of life on Earth, which appears to be controlled by universal laws of physics and chemistry, must have been repeated elsewhere in the universe.  The experimental approaches in our laboratory to understand the origin of life on the Earth are summarized in an attempt to obtain a better insight into the chemical basis of extraterrestrial life.
authors.affiliation: Department of Chemistry and Biochemistry, University of Maryland, College Park 20742.
authors.forename: C
authors.initials: C
authors.lastname: Ponnamperuma
authors.forename: Y
authors.initials: Y
authors.lastname: Honda
authors.forename: R
authors.initials: R
authors.lastname: Navarro-González
mesh_terms: D000596:Amino Acids; D055598:Chemical Phenomena; D002621:Chemistry; D018534:Earth, Planet; D018559:Exobiology; D005118:Extraterrestrial Environment; D018535:Mars; D008903:Minerals; D016081:Moon; D009711:Nucleotides; D000069497:Origin of Life; D016083:Planets; D011108:Polymers; D012107:Research Design; D016082:Solar System; D014131:Trace Elements
chemical_list: D000596:Amino Acids; D008903:Minerals; D009711:Nucleotides; D011108:Polymers; D014131:Trace Elements