The idea of the Big Bang Theory being the creation of the universe was supported by scientists.
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The leaders of North Korea and the USA met for the first time ever.
The Fontana dei Quattro Fiumi, a fountain, was unveiled in Rome.
Roy and Gaye Raymond founded Victoria's Secret and opened its first store in San Francisco.
Nearly one million people protested for the disarmament of nuclear weapons in Central Park, New York City.
Harry Houdini broke free from a straitjacket while hanging upside down 40 feet in New York City, US.
