Why the Most Controversial 2020 Mars Rover Landing Site Could Also Be the Most Exciting

After much anticipation, NASA has finally released a shortlist of landing sites for its Mars rover mission slated for July 2020. The three finalists are Northeast Syrtis, which may have been warmed by volcanic activity, the Jezero Crater, which could be the remnants of a Martian lake, and Columbia Hills, which NASA's...