Many people have never heard of British scientist Rosalind Franklin. Her research helped solve the mystery of the structure of DNA - the building blocks of life.  In 1952, Franklin took X-Ray photographs of a molecule that showed DNA contains two strands wrapped around each other in a double helix, like a twisted ladder.  The clearest image, known as photograph 51, enabled other scientists to build a model of DNA, and they received credit for it. In Washington, a play at the Jewish Community Center called “Photograph 51” depicts Franklin as the only woman doing DNA research then in a man’s world.  The play coincides with women’s history month in the US. VOA's Deborah Block has more.