text: NASA has sent spacecraft to observe the surface of mars and the first on they sent was Viking 1 took pictures of the surface of mars and there seemed to be a face and they thought that there was an anceint civilaztion that built it. Later on they sent another spacecraft to take even better detail of the surface of mars. And in 1998 they got even more detial than in 1976. Then in 2001 They took pictures of it again and with even more resolution.