Rosalind Franklin and her lab assistant famously imaged the structure of DNA using X-ray crystallography, an achievement that directly facilitated James Watson and Francis Crick’s discovery of the double helix. For what would be Rosalind’s 100th birthday, the Stereo Chemistry team consults scientists and historians to envision the many ways the world might be different without the now-famous Photograph 51. Listen to the Distillations episode “Science on TV” at bit.ly/30yjZuU.