NASA Headquarters is offering a federal grant opportunity titled "ROSES 2025: C.16 Laboratory Analysis of Returned Samples," aimed at supporting research and development in space and Earth sciences. Proposals are invited from institutions affiliated with NASA's NSPIRES system, with a focus on U.S. organizations, although non-U.S. entities may apply under specific conditions outlined in the NASA Proposer's Guide. This grant is part of the broader ROSES-2025 solicitation, which encompasses various program elements, allowing for continuous proposal submissions until the final deadline of March 31, 2026. Interested applicants can find further details and necessary documentation at the provided links, and inquiries can be directed to Katharine Robinson and Curtis Williams at HQ-LARS@mail.nasa.gov.