A researcher of the INSERM, the French National Institute of Health and Medical Research, prepares tumor samples using a fluorescence-marker microscopy technique, in Nantes, western France, on October 8, 2026. The so-called Artemis project has a distinctive focus: its research is dedicated entirely to breast cancers affecting young women. The goal is to better understand the unique biology of these tumors and, ultimately, to develop more targeted and effective treatments. (Photo by Sebastien Salom-Gomis / AFP via Getty Images)