"The actual material is some kind of tar, which was made by heating the birch bark. After the tar was made, it was boiled, and when it cooled, it became solid. When it was heated again, it became softer, and only then was it used as a kind of chewing gum. Sarah's discovery is particularly significant because well-defined tooth imprints were found on the gum."
Pickin's discovery has helped her make up her mind to study the history of the chewing gum further.
"I was delighted to find the gum and was very excited to learn more about the history of it," she said.
"I'm keen to work in this area in the future and I'd love to go back to the site, so I'm hoping they're impressed by the gum and the tests come up with some interesting results," she added.
Source-ANI
SRM/B