In 1922 – The BBC sent its first transmission from station 2LO at Marconi House London. The first newscast was read by Arthur Burrows, first Director of Programmes.
In 1971 – The American space probe Mariner 9 began orbiting Mars becoming the first spacecraft to successfully orbit another planet.
In 2007 – The last Direct Current electrical distribution system in the US was shut down by Con Edison in New York.
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