It was 70 years ago today that the famous Watson and Crick paper was published in Nature along with papers by Franklin & Gosling and Wilkins, Stokes, & Wilson. Threre's a great deal of misinformation circulating about this discovery so I wrote up a brief history of the events based largely on Horace Freeland Judson's book The Eighth Day of Creation. Every biochemistry and molecular biology student must read this book or they don't qualify to be an informed scientist. However, if you are not a biochemistry student then you might enjoy my short version.
Some practising scientists might also enjoy refreshing their memories so they have an accurate view of what happened in case their students ask questions. 
Where Rosalind Franklin teaches Jim and Francis something about basic chemistry.
Where Jim and Francis discover the secret of life.
Here's the latest version of Rosalind Frankin's contribution written by Matthew Cobb and Nathaniel Comfort: What Rosalind Franklin truly contributed to the discovery of DNA's structure. If you want to know the accurate version of her history then this is a must-read. Cobb is working on a biography of Crick and Comfort is writing a biography of Watson.
Here are some other posts that might interest you on DNA Day.
- Rosalind Franklin Announces the Death of the Helix
- Sixty Years Ago Today: April 25, 1953
- Rosalind Franklin's Birthday
- Did Rosalind Franklin produce the first X-ray diffraction images of DNA?
- The Wilkins, Stokes and Wilson Nature paper (1953)
- The Franklin & Gosling Nature paper (1953)
- The Watson & Crick Nature Paper (1953)