This Day in History for December 21 — Pilgrims Hit Plymouth Rock, and More

Here’s a look at some interesting events that took place on this day in history:

1620: William Bradford and the Mayflower Pilgrims land on what is now known as Plymouth Rock in Plymouth, Massachusetts (more info)

1898: Pierre and Marie Curie discover radium (more info)

1913: Arthur Wynne's "word-cross," the first crossword puzzle, is published in the New York World (more info)

1937: 'Snow White and the Seven Dwarfs,' the world's first full-length animated feature, premieres at the Carthay Circle Theater (more info)

1988: A bomb explodes on board Pan Am flight 103 over Lockerbie, Scotland, killing 270 people (more info)