Explore each unique borough of NYC, from past to present. buff.ly/4bcDQCz

Roman emperor and Stoic philosopher Marcus Aurelius was born on this day in 121 CE.

New York became the first state to require automobile license plates on this day in 1901.

Brothers Samuel and John Colt had quite the divergent life paths. buff.ly/3WjNmjn

Estée Lauder, one of the most successful American businesswomen of the 20th century, died on this day in 2004.

The US Army's 90th Infantry Division liberated Flossenbürg concentration camp in Germany and freed 1,500 prisoners on this day in 1945.

Happy Earth Day! Celebrate the beauty of the planet we call home. buff.ly/3osfvpf

John Adams was sworn in as the first US Vice President on this day in 1789.

Learn more about the people and decisions that made history. buff.ly/3U0ueE6

The Septinsular Republic was established on this day in 1800. It was a short-lived oligarchy in the Ionian Islands under Russian and Ottoman control.

World War II ended in 1945, but this soldier didn't surrender until 1974. buff.ly/4aSMLsS

Marie Antoinette married Louis XVI of France in a proxy wedding on this day in 1770, for which he was not actually present. They met for the first time a few weeks later.

The final session of the League of Nations concluded in Geneva on this day in 1946.

Ralph Abernathy died on this day in 1990. He was a leader of the civil rights movement and a close friend and mentor of Martin Luther King Jr.

When it comes to delivering you fresh baseball book recs, we swing for the fences. buff.ly/3TTWrfH

Slavery was outlawed in Washington, D.C. on this day in 1862.

Today is Jackie Robinson Day, observed by the MLB on the anniversary of his 1947 major league debut.

Alice Rufie Jordan Blake was determined to attend law school, despite the barriers. buff.ly/4aIAG9A

There was a mass sighting of celestial phenomenon over Nuremberg on this day in 1561. Witnesses described it as an 'aerial battle', and scientists are still unsure what actually took place.

Ian Fleming's novel 'Casino Royale' was published on this day in 1953, introducing the character James Bond for the first time.