| 1 | 1904 | - 9 Nov 1904: In 1904, the first flight lasting more than five minutes took place on November 9. The Flyer II was flown by Wilbur Wright.
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| 2 | 1905 | - 1905: Einstein evolved the Special Theory of relativity
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| 3 | 1909 | - 16 Jan 1909: Ernest Shackleton\'s expedition finds the magnetic South Pole
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| 4 | 1912 | - 15 Apr 1912: On the night of April 14, at 11:40 p.m., The Titanic struck an iceberg; just under three hours later, at 2:20 AM, on April 15, 1912 the ship sank.
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| 5 | 1914 | - 28 Jul 1914—11 Nov 1918: World War I
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| 6 | 1915 | - 25 Apr 1915: Gallipoli campaign starts (declared ANZAC Day in 1916)
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| 7 | 1923 | - 1923: Vegemite is first produced.
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| 8 | 1924 | - 4 Jun 1924: Radio station 6WF conducts first radio broadcasts in Perth, Western Australia.
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| 9 | 1927 | - 1927—1948: Aborigines banned from entering the centre of Perth, Western Australia.
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| 10 | 1928 | - 1928—1933: The Great Depression.
- 1928: Mickey Mouse cartoon character created by Walt Disney and Ub Iwerks at The Walt Disney Studio.
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| 11 | 1929 | - 1929: 'Talkies' or movies with sound are seen in Perth, Western Australia for the first time.
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| 12 | 1939 | - 1 Sep 1939—15 Aug 1945: World War II
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| 13 | 1945 | - 1945: First Computer Built
- 30 Apr 1945: Adolf Hitler committed suicide by gunshot in his Fuhrerbunker in Berlin. His wife Eva (nee Braun), committed suicide with him by ingesting cyanide.
- 6 Aug 1945: Atomic bombing of Hiroshima.
- 9 Aug 1945: Atomic bombing of Nagasaki.
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| 14 | 1948 | - 1948: Aborigines recognised as Australian citizens.
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| 15 | 1955 | - 1 Nov 1955—30 Apr 1975: Vietnam War
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| 16 | 1956 | - 1956: Eurovision Song Contest starts
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| 17 | 1959 | - 16 Oct 1959: Television officially screened to Western Australian Homes.
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| 18 | 1961 | - 1961: Berlin Wall Built
- 12 Apr 1961: The first manned spaceflight was launched by the Soviet Union as a part of the Vostok programme of space exploration, with a cosmonaut Yuri Gagarin on board.
- 5 May 1961: The United States became the second nation to achieve manned spaceflight, with the suborbital flight of astronaut Alan Shepard aboard Freedom 7, carried out as part of Project Mercury.
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| 19 | 1962 | - 1962: Perth gets the name 'City of Light' as John Glenn passed over the city in his Mercury spacecraft.
- 5 Aug 1962: Marilyn Monroe was found naked, dead in the bedroom of her Brentwood, California home by her live-in housekeeper Eunice Murray on August 5, 1962. She was 36 years old at the time of her death.
- Oct 1962: The Cuban missile crisis.
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| 20 | 1963 | - 1963: Martin Luther King Jr. Makes His 'I Have a Dream' Speech
- 22 Nov 1963: The assassination of John F. Kennedy, the thirty-fifth President of the United States, took place on Friday, November 22, 1963, in Dallas, Texas, USA at 12:30 p.m. CST
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| 21 | 1964 | - 1964: Nelson Mandela Sentenced to Life in Prison
- 1964: Eric Edgar Cooke becomes the last person hanged in Western Australia.
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| 22 | 1966 | - 1966: Star Trek T.V. Series Airs
- 14 Feb 1966: Decimal currency is introduced.
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| 23 | 1967 | - 27 May 1967: Australian referendum relating to Indigenous Australians. The results of the referendum recognised Aboriginal people on the census and made "Aboriginal Affairs' the responsiblity of the Commonwealth.
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| 24 | 1969 | - 20 Jul 1969: Moon Landing - On July 20, Armstrong and Aldrin became the first humans to land on the Moon, while Collins orbited above.
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| 25 | 1970 | - 1970: Computer Floppy Disks Introduced
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| 26 | 1972 | - 30 Jan 1972: Bloody Sunday - Derry, Northern Ireland, in which 26 unarmed civil-rights protesters and bystanders were shot by soldiers of the British Army.
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