Neanderthals Created Glue For Hand Tools

An amazing discovery has been made involving the Neanderthals. An article published by source describes a hand tool crafted by neanderthals was joined together by a glue like substance with a very specific amount of materials to make the glue ideal to work with, without being too sticky.

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Fig. 4. Experiments investigating the benefit of goethite ochre in bitumen-based adhesives. (A and B) Stress/strain diagrams of uncooked and cooked (100 min) fresh bitumen samples with and without ochre. (C) Stress/strain diagrams of air-dried bitumen with and without ochre. (D and E) Composite tool consisting of a stone tool and a grip made from fresh bitumen. (F and G) Composite tool consisting of a stone tool and a grip made from fresh bitumen and 55 wt % goethite ochre.

Source: https://www.science.org/doi/10.1126/sciadv.adl0822