By Dr. Cynthia Phillips
Planetary geologist at the Carl Sagan Center for the Study of Life in the Universe, SETI Institute
The final mission of Space Shuttle Atlantis has spawned a whole series of perspective pieces on the history, state, and future of space exploration. Some, like the YouTube video "NASA's increase of awesome to continue," are unabashedly exuberant celebrations of the future in store for us in space; others, like this thoughtful piece in Technology Review entitled "Was the Space Shuttle a Mistake?," are depressingly and effectively critical of the cost both in dollars (more…