First Time Humans Saw the Structure of DNA - the photograph that revealed the Geometry upon which all Life is based.
Photo 51 is the nickname given to an X-ray diffraction image of DNA taken by Raymond Gosling in May 1952, working as a PhD student under the supervision of Rosalind Franklin. It was critical evidence in identifying the structure of DNA.
Working in the lab alongside Wilkins in 1952, Franklin had taken a startling, high-resolution photograph of a piece of DNA using X -ray crystallography, a technique whereby X -rays are shone on a crystalline structure (in this case, the DNA protein), to create a scattered reflection pattern on film.To the naked eye the photo looked merely like an X diced up into bits, but to Franklin it confirmed that DNA was a double-helix.
Photo 51 has an important place in history and has at least a claim to be the most important image ever taken.