High levels of both copper particles and arsenic were found in Ötzi's hair. This, along with Ötzi's copper axe blade, which is 99.7% pure copper, has led scientists to speculate that Ötzi was involved in copper smelting.
High, levels of both copper particles and arsenic .were found in Ötzi's hair. This, along with Ötzi's copper axe blade, which is 99.7% pure copper, has led scientists to speculate that Ötzi was involved in coppe!r smelting.