11.   For instance, the lander spacecraft is to probe deep beneath the Martian surface in search of water, which is considered the crucial ingredient for life.

12.   He cited as examples possible missions to dig deep into the Martian surface, then to bring back samples.

13.   Hematite, an iron oxide, is spread across the Martian surface in a fine dust.

14.   If the post-landing checkout of communications and electrical power gear meets the satisfaction of control teams on Earth, Sojourner should roll onto the Martian surface shortly after midnight.

15.   In practice sessions, mission engineers operate blind without being able to see in the room, just as if they were communicating with the distant Martian surface.

16.   Its orbit will change slightly on each pass so that the satellite will be able to map almost the entire Martian surface.

17.   Mojzsis says that discovery, along with those by Scripps scientists, heighten scientific interest in the Martian surface.

18.   Of more historical importance, Golombek said, is the fact that scientists for the first time have a little roving field geologist on the Martian surface.

19.   On Monday, Surveyor is expected to point its camera and scientific instruments toward the Martian surface for the first time.

20.   Payload includes two microprobes that are to smash into the Martian surface, testing new technologies and searching for traces of subsurface ice.