Insulin once meant death until Dr. Frederick Banting changed everything. In 1922, he helped create the first successful insulin treatment, saving a 14-year-old boy’s life. Banting sold the patent for $1, believing medicine should save lives not make money. | History Fact Zone

Frederick Sanger, born on this day in 1918, is one of only six laureates to have received the Nobel Prize more than once and the only person to have received the Nobel Prize in Chemistry twice. | Nobel Prize