Chewing gum is made by first melting down the base of rubbers, waxes, and polymers (which are yes, plastic) or a natural base of tree sap. A syrup, like glucose, is then added to make the gum ...

A correspondent of the Lewiston Journal, III a letter from Byron, Me., says: "The spruce gum business of this region is quite large. I am told that a merchant of Weld purchased in a single year ...

Native Americans chewed spruce tree resin, while ancient Mayans extracted chicle from sapodilla trees for their chewing needs. Today’s commercial gums bear little resemblance to these natural ...