From the BBC: Student dig unearths ancient gum.
A 5,000-year-old piece of chewing gum has been discovered by an archaeology student from the University of Derby.
Sarah Pickin, 23, found the lump of birch bark tar while on a dig in western Finland.
Neolithic people used the material as an antiseptic to treat gum infections, as well as a glue for repairing pots.
Ms Pickin’s tutor, Professor Trevor Brown, said: "It’s particularly significant because well defined tooth imprints were found on the gum."
He explained: "Birch bark tar contains phenols, which are antiseptic compounds." [continue]