Recent archaeological evidence shows Neanderthals used birch tar as an antiseptic treatment, demonstrating previously unknown medical sophistication. The discovery challenges long-held assumptions about Neanderthal cognitive abilities and their understanding of natural remedies.

Birch tar, extracted through a complex heating process, contains compounds with antibacterial properties that could effectively treat wounds and infections. The production of this substance required advanced planning and technical knowledge, suggesting Neanderthals possessed more complex problem-solving abilities than previously recognized.