The planetary science community has initiated the much-needed conversations to delve into the full breadth of IDEA principles. There are many lessons learned and best practices from the experience of other Science, Technology, ...

Here we focus on mission concepts, driving science objectives, and technologies that enable access to a major new frontier in planetary science, the Martian subsurface, with a focus on modern subsurface habitability & life.

We endorse the MASWG vision for a rejuvenated Mars Exploration Program in the next decade, based on the compelling assertion that "Mars has a uniquely accessible archive of the long-term evolution of a habitable planet."

The physical processes active during the first billion years (FBY) of Earth's history, such as accretion, differentiation, and impact cratering, provide constraints on the initial conditions that were conducive to the ...