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Information × Registration Number 2114U002022, Article popup.category Thesis Title popup.author popup.publication 01-01-2014 popup.source_user Сумський державний університет popup.source http://essuir.sumdu.edu.ua/handle/123456789/45611 popup.publisher Sumy State University Description Chewing gum is a soft, cohesive substance intended for chewing but not swallowing. Humans have used chewing gum for at least 5,000 years. Chewing gum in various forms has existed since the Neolithic period. 5,000-year-old chewing gum made from bark tar, with tooth imprints, has been found in Kierikki, Yli-Ii, Finland. popup.nrat_date 2025-05-12 Close