This week, we celebrate International Women's Day! Claire explores the global impact of breast cancer, a disease that affects millions of women worldwide, and talks about some of the latest research and challenges in the fight for better treatments and outcomes. Meanwhile, Linden shares the inspiring story of pioneering chemist and Isabel Joy Bear, who defied expectations to become a trailblazing researcher at CSIRO and identified the chemistry of the smell of rain - know known as petrichor.