70K views · 2K reactions | Earth is struck far more often than the visible craters suggest—most impactors, like low-density comets, don’t leave lasting scars. Events like Tunguska vanish within decades, while only denser objects, like iron-rich meteorites, leave craters we can still see. So if we’re only counting holes in the ground, we’re missing most of the story. See more from Randall: https://www.youtube.com/@TheRandallCarlson | Cosmic Summit | Facebook