On this day in history - February 23

What Happened On This Day – February 23

• 1954 The first mass inoculation against polio is conducted

  Virologist Jonas Salk's vaccine is still one of the two versions used today, along with Hilary Koprowski's live polio vaccine.

• 1947 The International Organization for Standardization (ISO) begins operating

  The ISO issues standards for everything from bicycle tires to date formats.

• 1941 Glenn T. Seaborg and his team chemically identify Plutonium

  The radioactive element plays an important role as nuclear fuel or in nuclear weapons.

• 1917 The February Revolution begins in Russia

  The demonstrations and armed clashes ultimately resulted in the demise of the Russian Empire.

• 1455 The Gutenberg Bible is published

  Johannes Gutenberg's Bible edition was the first book ever printed in movable type, heralding the age of the printed book in the West.