By studying artefacts that date back to the first 6 centuries AD through the lens of chemistry, archaeology, and textual analysis, researchers have discovered birch tar was being used right up to late antiquity, if not longer. The artefacts in question — found in a region where birch is scarce, thus raising the question of how it was procured — are testimony to the strength of tradition among the Gauls.
Click here for original story, World’s oldest glue used from prehistoric times till the days of the Gauls
Source: ScienceDaily