This post originally appeared in the online anthropology magazine SAPIENS. Follow @SAPIENS_org on Twitter to discover more of their work.
Stone tools, like Acheulean hand axes, remain well-preserved for eons because they are stones first, tools second. Fired ceramics remain well-preserved for millennia because they are, in essence, human-made stone. Metal tools may, in some rare instances, endure for millennia, but their material hardness belies chemical fragility; most are not stable ove