1758 French astronomer Charles Messier mistakenly identifies the Crab Nebula so begins his Messier Catalogue
1909 World's first patent for synthetic rubber granted to German chemist Fritz Hofmann
1933 Leó Szilárd, waiting for a red light on Southampton Row in Bloomsbury, conceives idea of a nuclear chain reaction
1940 4 teens, following their dog down a hole near Lascaux France discover 17,000-year-old drawings now known as Lascaux Cave Paintings
1958 US Supreme Court orders the all-white Central High School in Little Rock, Arkansas to integrate
1959 Luna 2 launched by USSR; 1st spacecraft to impact on the Moon
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