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Watson and Crick with their DNA model

^BCOMMERCIAL USE REQUIRES CLEARANCE.^bThe discoverers of the structure of DNA. James Watson (b.1928) at left and Francis Crick (1916-2004), with their model of part of a DNA molecule in 1953. Crick & Watson met at the Cavendish Laboratory, Cambridge, in 1951. Their work on the structure of DNA was performed with a knowledge of Chargaff's ratios of the bases in DNA and some access to the X-ray crystallography of Maurice Wilkins and Rosalind Franklin at King's College London. Combining all of this work led to the deduction that DNA exists as a double helix. Crick, Watson and Wilkins shared the 1962 Nobel Prize for Physiology or Medicine, Franklin having died of cancer in 1958. Photographed in the Cavendish Laboratory, University of Cambridge, UK, in May 1953

© A. BARRINGTON BROWN/SCIENCE PHOTO LIBRARY

John Knox reproving Mary, Queen of Scots

Leader of the Scottish Reformation John Knox reproving the Catholic Mary, Queen of Scots, for her religious beliefs. From ?Wycliffe to Wesley; Heroes and Martyrs of the Church in Britain? published in 1885 by T. Woolmer, London. Author Gregory J. Robinson

© Linda Steward

16th Century Style, 19th Century Style, 515835719, Action, Adult, Anger, Authori

The Beatles at the EMI Studios

The Beatles (L-R) Paul McCartney, John Lennon, Ringo Starr and George Harrison rehearse for their appearance in the internaional television programme 'Our World' at the EMI Studios, St. John's Wood, London. * The group have written a song especially for the programme called 'Love is all you need'. The programme will be seen live in 24 countries all over the world with a potential audience of 400 million people. ghgal CELEBRITY

© PA/EMPICS