May 1st

• 1952

  The popular children's toy Mr. Potato Head is introduced to the market.

• 1920

  In the longest Major League Baseball game by innings, the Brooklyn Robins and Boston Braves finish in a 1-1 tie after 26 innings.

• 1957

  Larry King starts his broadcasting career with his first radio show on WAHR (1490-AM) in Miami Beach, Florida.

• 1915

  The British ocean liner Lusitania embarks on its final voyage from New York to Liverpool, which would later end in tragedy.

• 1943

  The United States implements food rationing during World War II.

• 1939

  The famous comic book character Batman makes his debut in Detective Comics #27.

• 1930

  An 11-year-old girl, Venetia Burney, officially gives the newly discovered celestial body the name Pluto.

• 1886

  A nationwide general strike in the United States begins, demanding an 8-hour workday.

• 1948

  North Korea declares itself as the Democratic People's Republic of Korea.

• 1840

  The United Kingdom issues the Penny Black, the world's first adhesive postage stamp.

• 1931

  The iconic Empire State Building is inaugurated in New York City.

• 1900

  An unexpected explosion at a mine in Scofield, Utah, causes a tunnel collapse, killing 200 people.

• 2011

  U.S. special forces kill Al-Qaeda founder and leader Osama bin Laden in Abbottabad, Pakistan.

• 1873

  The United States issues its first postal card.