原来这就是真的“星尘”，微陨石。在你家屋顶、汽车顶上就有。#科学人医疗社会史##科学人生命科学史#
图源：M.J. Genge, J. Larsen, M. Van Ginneken, M.D. Suttle; An urban collection of modern-day large micrometeorites: Evidence for variations in the extraterrestrial dust flux through the Quaternary. Geology 2017;; 45 (2): 119–122.
