23 January in history.

1849

America's first woman doctor. After several medical schools turned her away, Elizabeth Blackwell earned her degree from Geneva Medical College in New York. No woman in the United States had qualified as a doctor before her.

Wikipedia: Elizabeth Blackwell

Photo: Unknown photographer / Wikimedia Commons (Public domain)

More from 23 January

1. 

   1957

   The Frisbee gets its name

   Inventor Fred Morrison sold his plastic flying disc to the toy company Wham-O. They gave it a new name: the Frisbee.

   Wikipedia: FrisbeeWikipedia: Walter Frederick Morrison

   Photo: Petey21 / Wikimedia Commons (Public domain)

2. 

   1960

   To the deepest point of the ocean

   The deep-sea vessel Trieste dived almost 11 kilometres down in the Pacific Ocean, deeper than anyone had been before.

   Wikipedia: Trieste (bathyscaphe)Wikipedia: Challenger Deep

   Photo: Unknown author / Wikimedia Commons (Public domain)

3. 

   1986

   Rock and roll's first hall of famers

   The Rock and Roll Hall of Fame named its first members, including Chuck Berry, Ray Charles, Little Richard, James Brown and Buddy Holly.

   Wikipedia: Rock and Roll Hall of Fame

   Photo: GordonMakryllos / Wikimedia Commons (CC BY-SA 4.0)

4. 

   1993

   Mosaic opens up the web

   Marc Andreessen and Eric Bina released Mosaic, the first web browser to become widely popular.

   Wikipedia: NCSA MosaicWikipedia: Marc Andreessen

   Photo: Charles Severance / Wikimedia Commons (CC0)

Moments chosen for discovery, creativity and courage. Each one links to a source where you can read more; photos are credited to their owners.