- 1661 The Treaty of The Hague is signed whereby the Dutch Republic sells New Holland (Brazil) for 63 tonnes of gold to Portugal
- 1890 At Auburn Prison in New York, murderer William Kemmler becomes first person to be executed by electric chair
- 1945 Atomic bomb dropped on Hiroshima by the US B-29 Superfortress "Enola Gay"
- 1965 US President Lyndon B. Johnson signs the Voting Rights Act prohibiting voting discrimination against minorities
- 1991 Tim Berners-Lee releases files describing his idea for the World Wide Web. WWW debuts as a publicly available service on the Internet.
- 1996 NASA announces that life may have existed on Mars after examining meteorite ALH84001, thought to be from Mars
Prometheus, the world's oldest tree, is cut down in Nevada US
On August 6, 1964