April 15


  • 1452 - The great Renaissance thinker, chemist, artist, architect, and inventor Leonardo da Vinci was born.
  • 1730 - Felice Fontana, an Italian physicist who discovered the water gas shift reaction in 1780, was born. He is also credited with launching modern toxicology and investigating the human eye.
  • 1923 - Insulin became available for use by diabetics.
Labels
  • None