“Be Prepared!” cries the motto of several organizations. It could also be the motto of everyone connected with this study: “Extraterrestrial regolith is hemostatic and potentially suitable for hemorrhage control in space,” Nabil Ali-Mohamad, Ting-Hsuan Wang, Lih Jiin Juang, Nuoya Peng, Massimo F. Cau, Kevin Cannon, and Christian J. Kastrup, Research and Practice in Thrombosis and Haemostasis, vol. 10, no. 1, 2026.