Chemical analysis of samples from Mars rock the area was habitable . A lot of organic compounds also are degraded in the presence of heat , he said . This is the first planet apart from Earth to be considered habitable at some point in time . The Mars rover landed on Mars on August 6 .
Chemical analysis of samples from Mars rock the area was habitable . This is the first planet apart from Earth to be considered habitable at some point in time . The Mars rover landed on Mars on August 6 .