1934 - The 'Surgeon's Photograph', the most famous photo allegedly showing the Loch Ness Monster, was published in the Daily Mail. In 1999, it was revealed to be a hoax.

1981 - Steve Davis became the world snooker champion at 23 years of age, beating Doug Mountjoy at Sheffield.

1775 - The Battle of Lexington and Concord began, which kicked off the American Revolutionary War between 1775 and 1783.

1912 - The Cunard liner RMS Carpathia brought 705 survivors to New York from the RMS Titanic that had sunk on the 15th April 1912 after colliding with an iceberg during her maiden voyage from Southampton.

1951 - The Peak District (which covers Derbyshire, Cheshire, Staffordshire, Yorkshire and Greater Manchester) was officially confirmed as the United Kingdom's first National Park.

1997 - A DNA data base for birds was launched, to deter thieves from stealing valuable eggs.

2019 - The historic Notre-Dame de Paris caught fire during a restoration campaign. The blaze destroyed most of the cathedral's roof and the 19th-century spire.

2010 - Eyjafjallajökull volcano in Iceland sent ash plumes into the skies that spread and disrupted air traffic across northern and central Europe. Over 95,000 flights had been cancelled all across Europe during the six-day airspace ban.

1892 - The birth of Sir Robert Alexander Watson-Watt, considered by many to be the inventor of radar. The system provided the vital advance information that helped the Royal Air Force win the Battle of Britain.