The life aquatic.
If we want to know for sure whether there was, or still is, life on Mars, we have to send people there.
Petsko
Gregory A
GA
Rosenstiel Basic Medical Sciences Research Center, Brandeis University, Waltham, MA 02454-9110, USA. petsko@brandeis.edu
D000220:Adaptation, Biological; D018480:Astronauts / Q000639:trends; D018559:Exobiology; D005118:Extraterrestrial Environment / Q000737:chemistry; D023281:Genomics; D019369:Life; D018535:Mars; D014481:United States; D018557:United States National Aeronautics and Space Administration / Q000639:trends