Largest diamond sparkles at 1.33 pounds

• On Jan. 25, 1905, at the Premier Mine near Pretoria, South Africa, a 3,106-carat diamond is discovered during a routine inspection by the mine’s superintendent. Weighing 1.33 pounds and christened the “Cullinan,” it was the largest diamond ever found.

• On Jan. 22, 1912, Florida East Coast Railroad opened, running between Key West and the mainland. The railroad closed in 1935. Three years later, the roadway was paved, bringing automotive traffic to the Florida Keys for the first time.

• On Jan. 23, 1922, at Toronto General Hospital, 14-year-old Canadian Leonard Thompson becomes the first person to receive an insulin injection as treatment for diabetes. The teenager improved dramatically, and the University of Toronto immediately gave pharmaceutical companies license to produce insulin, free of royalties.

• Jan. 24, 1935, canned beer makes its debut. The Gottfried Krueger Brewing Company delivered 2,000 cans of Krueger’s Finest Beer and Krueger’s Cream Ale to Richmond, Va. Ninety-one percent of the drinkers approved of the beer, driving Krueger to give the green light to further production.

•On Jan. 20, 1945, Franklin Delano Roosevelt, the only president to be elected to three terms in office, is inaugurated to his fourth term. In 1947, the 22nd Amendment to the U.S. Constitution was passed, limiting future presidents to a maximum of two elected terms in office, or one elected term if the president already served more than two years of another president’s elected term.

• On Jan. 19, 1953, episode No. 56, “Lucy Goes to the Hospital,” of hit 1950s sitcom “I Love Lucy” airs for the first time. The episode, in which Lucy Ricardo, famously played by Lucille Ball, gives birth to a son, was one of the most popular in television history.