Mars Sample Return Timeline By El Drago Oct 29, 2020 IRB recommends MSR proceed 1 Apr 7, 2022 2023-32 Decadal Survey released https://www.nationalacademies.org/our-work/planetary-science-and-astrobiology-decadal-survey-2023-2032 May 14, 2023 IRB-2 begins working Sep 1, 2023 IRB-2 reports Apr 15, 2024 MIRT Responds to IRB-2 Apr 16, 2024 NASA requests industry proposals Jun 9, 2024 NASA selects 7 proposers to conduct studies