NASA picks two finalists for upcoming space missions: a trip to a comet and one to Saturn's moon Titan

A mission to return a comet sample to Earth and one to explore different parts of Saturn’s moon Titan, to see if it hosts life were selected today by NASA as finalists in a competition for a future robotic mission in our Solar System, part of a program called New Frontiers.
The first mission, spearheaded by Steve Squyres at Cornell University, is called CAESAR, or Comet Astrobiology Exploration Sample Return. It will involve sending a spacecraft to comet Churyumov-Gerasimenko, the same com