Neanderthals used resin from pine trees as glue to stick stone tools to wooden handles, say scientists who have discovered one of the earliest known examples of ancient humans using adhesives. The ...

Flints bearing traces of pine resin. The letter "R" indicates the presence of visible resin, and the arrows point to spots where researchers sampled material for chemical analysis. (Credit: Degano et ...

Archaeologists working in two Italian caves have discovered some of the earliest known examples of ancient humans using an adhesive on their stone tools--an important technological advance called ...