When Dr. Mack Scharmett was 50 years old, gas was 34 cents a gallon. An average car cost $3,000.
When he was 20 years old, an average house cost $3,900.
When the good doctor was 10 years old, the yo-yo was introduced. So was “Steamboat Willie,” a short film that marked the debut of cartoon character Mickey Mouse.
Born in the final year of World War I, Dr.
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