New experiments show that tar made from birch bark — long known as a tool adhesive — can inhibit harmful bacteria such as Staphylococcus aureus, suggesting Neanderthals may have used it to treat wounds and manage infection during the Ice Age. Neanderthals probably used birch tar for multiple functions, including treating their wounds. Siemssen et al. confirm that birch tar possesses selective antibacterial properties, showing consistent...
