"This speech had to be different. While King was by now a national political figure, relatively few outside the black church and the civil rights movement had heard him give a full address. With all three television networks offering live coverage of the march for jobs and freedom, this would be his oratorical introduction to the nation."

- Gary Young on the making of Martin Luther King’s ‘I have a dream’ speech http://gu.com/p/3hze8
Photograph: © Bob Adelman/Magnum

"This speech had to be different. While King was by now a national political figure, relatively few outside the black church and the civil rights movement had heard him give a full address. With all three television networks offering live coverage of the march for jobs and freedom, this would be his oratorical introduction to the nation."

- Gary Young on the making of Martin Luther King’s ‘I have a dream’ speech http://gu.com/p/3hze8

Photograph: © Bob Adelman/Magnum

This summer the 100th edition of the the world’s most famous bike race takes place. And, as Tim Lewis discovers in a lavish new book, tales of cheating, heroism and endeavour have been part of the Tour de France from the very start

Photograph: Collection Laget

Margaret Thatcher has been granted a ceremonial funeral - which, although not quite as high an honour as the state funeral accorded to Winston Churchill in 1965, certainly contrasts sharply with the funeral of Clement Attlee, who died in 1967.

More on the archive blog from October 1967: A quiet funeral for Lord Attlee

From our archive: The Guardian front page from 23 November 1990, the day after Margaret Thatcher resigned.

More on Margaret Thatcher including her life in pictures

Margaret Thatcher has died after stroke, aged 87. Photograph shows Thatcher in 1979 outside 10 Downing Street following her election as prime minister in May. She was Britain’s first female prime minister. From our gallery: Margaret Thatcher - a life in pictures
Photograph: PA

Margaret Thatcher has died after stroke, aged 87. Photograph shows Thatcher in 1979 outside 10 Downing Street following her election as prime minister in May. She was Britain’s first female prime minister. From our gallery: Margaret Thatcher - a life in pictures

Photograph: PA

From the Observer archive, 13 April 1969: ‘The Elvis factory has grossed in excess of $200m’

The King’s music is almost a sideline, with merchandise and films taking centre stage

Photograph: Elvis Presley married longtime sweetheart Priscilla in May 1967, ending many a fan’s dream Michael Ochs Archives/Getty Images

Here are some great archive pictures from Edinburgh Zoo - which is 100 years old this year. The zoo was established by Edinburgh lawyer Thomas Gillespie. Just check out the baby chimps cuddling their keeper Mr D. Johnstone. The zoo’s history will be celebrated in an exhibition opening to the public on Wednesday. 

Photographs: T.H. Gillespie/Edinburgh Zoo/PA

Andy Warhol: Self-portrait in Drag, 1981.

From 

The 10 best … photographic self-portraits

Photograph: The Andy Warhol Foundation