* EVENTS
1901 Queen Victoria dies
1914 First world war breaks out
1917 October revolution in Russia leads to communism
1919 Treaty of Versailles brings peace between Germany and the Allies
1929 Stock market crash heralds worldwide depression
1933 Adolf Hitler becomes chancellor of Germany
1939 Second world war begins
1945 First atom bomb is dropped on Hiroshima; second world war ends (above right)
1957 European Economic Community established
1961 Berlin Wall built
1962 Pope John XXIII modernises the church at Second Vatican Council
1963 American president John F Kennedy assassinated in Dallas Texas
1969 Neil Armstrong lands on the moon (above, right)
1989 The Berlin Wall is demolished
* IDEAS
1900 Sigmund Freud publishes psychoanalytic landmark The Interpretation of Dreams
1903 Wright Brothers invent the aeroplane (left)
1907 Artist Pablo Picasso breaks with tradition in Les Demoiselles d'Avignon
1916 Albert Einstein formulates general theory of relativity
1950 British mathematician Alan Turing writes"Can Machines Think?"
1962 Francis Crick and JD Watson receive Nobel prize for discovery of DNA structure
1991 Tim Berners-Lee invents the worldwide web