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 Spirit lander explored in early-to-mid 2000s. Though Jezero is reportedly the favourite among NASA scientists, in this case, it's the underdog that could be our best shot at finding hints at past or present life on the Red Planet -- which is exactly what the 2020 mission seeks to do.