- 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 (ALH84001)
Prometheus, the world's oldest tree, is cut down in Nevada US
On August 6, 1964