Add Yahoo as a preferred source to see more of our stories on Google. On Sept. 27, 1997, NASA's Mars Pathfinder mission beamed its very last data transmission back to Earth. The Mars Pathfinder ...

(CNN) — Here’s a look at the exploration of Mars. The United States, Soviet Union and China are the only three countries to land a spacecraft on Mars. There have been nine successful US Mars landings: ...

Death Valley days -- Tango Delta : touchdown -- A long road to a Red Planet -- Setting the stage -- The scarecrow -- Laying the foundation : Mars Pathfinder -- Curiosity's cousins : Spirit and ...