The Sample Collection for Investigation of Mars (SCIM) is a mission concept for a Mars air and dust sample return. It was a semi-finalist at the Mars Scout Program along with four other missions in December 2002.[2][3] The SCIM mission would be designed to skim through the Mars atmosphere without landing or entering orbit.[1] It would collect samples in an aerogel and take them back to Earth on a free-return trajectory.[4]
The success of fellow Discovery program mission Stardust was noted as supporting future sample return missions, and in particular supporting the SCIM concept.[1] This Stardust mission was similar in that it returned extraterrestrial material to Earth with an unmanned robotic spacecraft.[1]