title: Astrobiology. Returning alien rocks right the second time.
authors.forename: R A
authors.initials: RA
authors.lastname: Kerr
mesh_terms: D003264:Containment of Biohazards; D004780:Environment, Controlled; D018559:Exobiology; D005118:Extraterrestrial Environment; D018535:Mars; D009307:National Academy of Sciences, U.S.; D014481:United States; D018557:United States National Aeronautics and Space Administration