On what topic did James Watson and Alex Stokes have papers published in "Nature" on 25 April 1953?
Alex Stokes: Alexander (Alec) Rawson Stokes (27 June 1919 – 5 February 2003) was a co-author of the second of the three papers published sequentially in "Nature" on 25 April 1953 announcing the presumed molecular structure of DNA. Alex Stokes:  The first was authored by Francis Crick and James Watson, and the third by Rosalind Franklin and Raymond Gosling. James Watson: James Dewey Watson (born April 6, 1928) is an American molecular biologist, geneticist and zoologist, best known as one of the co-discoverers of the structure of DNA in 1953 with Francis Crick and Rosalind Franklin.
the structure of DNA