Astronomy:Space Exploration
Scientists now believe that is exactly what we will soon discover: lots of planets， just like earth. They are probably as common as dirt out there in the universe. Imagine if they are right， planets like earth as common as dirt， that changes everything， doesn't it? If that is what in store， then exploring space in the future figures to be quite an adventure.
- Added：2006
- Country：America
- Duration：60
- Time of update：2011/8/17 10:33:34