On January 3, 1521, Pope Leo X issues the papal bull Decet Romanum Pontificem, which excommunicates Martin Luther from the Catholic Church.

Escalating the tensions that would lead to rebellion and war, the Mexican government imprisons the Texas colonizer Stephen Austin in Mexico City.

On January 3, 1861, just two weeks after South Carolina became the first state to secede from the Union, the state of Delaware rejects a similar proposal.

Two years after British archaeologist Howard Carter and his workmen discovered the tomb of the Pharaoh Tutankhamen near Luxor, Egypt, they uncover the greatest treasure of the tomb—a stone sarcophagus containing a solid gold coffin that holds the mummy of Tutankhamen.

Franklin Delano Roosevelt, an adult victim of polio, founds the National Foundation for Infantile Paralysis, which he later renamed the March of Dimes Foundation, on January 3, 1938. A predominantly childhood disease in the early 20th century, polio wreaked havoc among American children every summer.

On January 3, 1959, George A. Kasem takes office in the U.S. House of Representatives for California’s 25th District, making history as the first Arab American Congressperson.

On January 3, 1959, President Eisenhower signs a special proclamation admitting the territory of Alaska into the Union as the 49th and largest state.

On January 3, 1967, Jack Ruby, the Dallas nightclub owner who killed the alleged assassin of President John F. Kennedy, dies of a massive blood clot in a Dallas hospital. The Texas Court of Appeals had recently overturned his death sentence for the murder of Lee Harvey Oswald and was scheduled to grant him a new trial.

On January 3, 1973, a 12-member group headed by George Steinbrenner purchases the New York Yankees for $10 million from Columbia Broadcasting System, which owned the team since 1964. The group includes CBS’s Yankees president Michael Burke, who briefly serves in that role under Steinbrenner. Known by many as "The Boss," Steinbrenner goes on to become one of the more controversial owners in sports history.

On January 3, 1987, Rock and Roll Hall of Fame admits its first woman: Aretha Franklin. Fewer than 100 female performers—less than 10 percent—have been added since the Hall began its induction ceremonies.

Matthew Stuart meets with Boston prosecutors and tells them that his brother, Charles, was actually the person responsible for murdering Charles’s wife, Carol. The killing of Carol Stuart, who was pregnant at the time, on October 23, 1989, had touched off a national outrage when Charles Stuart told authorities that the couple had been robbed and shot by an African American man while driving through a poor Boston neighborhood.

The Mars Exploration Rover Spirit lands on the Red Planet on January 3, 2004. 21 days later, its twin, Opportunity, also arrived safely. In one of the longest and most successful missions in NASA history, Spirit would survey Martian geography for the next seven years, while Opportunity remained active until June of 2018.