On this day in history - April 21

What Happened On This Day – April 21

• 1992 The first exoplanets are discovered

  Polish astronomer Aleksander Wolszczan announced that he found two planets orbiting the pulsar PSR 1257+12.

• 1967 Dictator Georgios Papadopoulos assumes power in Greece

  During his six-year reign, thousands of political opponents were incarcerated and tortured.

• 1934 The Surgeon's photo, allegedly showing the Loch Ness Monster, is published in the Daily Mail

  In reality, the famous image depicts a toy submarine with a head and neck made of wood putty.

• 1918 The Red Baron is killed

  Manfred von Richthofen was a legendary German fighter pilot. He earned his renown and nickname by achieving 80 air combat victories in World War I. He was shot down and killed during combat at the age of 25.

• 1509 Henry VIII is crowned King of England

  In popular culture, the monarch is known mainly for his six marriages, two of which ended with the wife's execution.