We combed through a number of high-school yearbooks and have compiled photos and accomplishments ... Warren Buffett said he wanted to be a stock broker. His top lieutenant, Berkshire Hathaway ...

An analysis of nearly 38,000 American high-school yearbook photos from the 1900s to the 2010s shows the gradual shift from serious to lighthearted expressions, reports Steve Dent for Engadget.