Thomas Adams lived in New York City in the 1870s. Rubber tires were beginning to be used on wagon and cars, and Adams went to work to find a cheaper substitute to rubber. He experimented with the dried sap of a Mexican chicle tree but repeatedly failed.
One day his son chewed on the sap and modern chewing gum was invented.
Whoever loves instruction loves knowledge, but he who hates reproof is stupid (Proverbs 12:1).