Chemical analysis of powder from Mars rock suggests area was habitable . This is the second environment apart from Mars to be declared habitable at some point in time . The bedrock in the crater where the rover drilled appears to be located in an ancient network of stream channels , which came down from the crater 's rim , NASA said . The 2-ton rover landed on Earth on May .
Chemical analysis of powder from Mars rock suggests area was habitable . This is the second environment apart from Mars to be declared habitable at some point in time . The 2-ton rover landed on Earth on May .