BBC News Online: Sci/Tech

Neanderthals 'used glue to make tools'

A sticky fingerprint on a fossilised blob of wood is firing the debate over how intelligent Neanderthals were.

The discovery suggests the ancient hunter-gatherers made tools by sticking stone heads to wooden handles with glue.

This was used to stick tools together, suggesting that Neanderthals were relatively sophisticated.

The fossilised wood tar, containing a fingerprint and the imprint of a flint stone tool was found near Königsaue in the northern foothills of the Harz Mountains.

In a new analysis, the specimen has been dated as being older than 80,000 years. Neanderthals are thought to have lived between about 300,000 and 30,000 years ago.

Scientists believe the wood tar (pitch) was prepared by slowly burning wood over a fire.

DIY skills

This requires technical competence and puts Neanderthals on an intellectual par with early modern humans, according to Dr Dietrich Mania of Friedrich-Schiller University, and colleagues.

The team writes in the European Journal of Archaeology: "The Neanderthals must have possessed a high degree of technical and manual abilities, comparable to those of modern Homo sapiens."

"It contributes directly to the debate on Neanderthals, who are generally depicted in the literature as rather less intelligent than their early modern human (Homo sapiens) competitors," he told BBC News Online.

Another question is how the Neanderthals learnt this behaviour.

"Was the pitch manufacture independently developed by the Neanderthals, or copied from their human competitors?" he said.

However, there are still some uncertainties over the dating of the samples. Given the lively debate over the rise and fall of the Neanderthals, some archaeologists are unlikely to be convinced.