The first ExoMars mission arrived at the Red Planet in October and now the second mission has been confirmed to complete its construction for a 2020 launch.
"A sedimentary basin such as this is a chemical reactor, elements get rearranged. New minerals form and old ones dissolve. Electrons get redistributed. On Earth, these reactions support life."
Dramatic climate cycles on early Mars, triggered by buildup of greenhouse gases, may be the key to understanding how liquid water left its mark on the planet's surface, according to a team of planetary scientists.