Frank’s inclusion of sexual material in her diaries makes sense—during her 25 months of hiding, she matured from a young girl into a young woman and even conducted a brief romantic relationship with Peter van Pels, a boy who hid with the Frank family. But to those who have read Frank’s diary, the real surprise is not that she addressed sexual topics—it’s that there’s more to discover about a 15-year-old murdered 73 years ago.
Before the war, Mengele had received doctorates in anthropology and medicine, and began a career as a researcher. He joined the Nazi Party in 1937 and the SS in 1938. He was assigned as a battalion medical officer at the start of World War II, then transferred to the Nazi concentration camps service in early 1943 and assigned to Auschwitz, where he saw the opportunity to conduct genetic research on human subjects. His subsequent experiments focused primarily on twins, with little regard for the health or safety of the victims.