LESS than 30% of researchers worldwide are women and UNESCO data shows that only about 30% of all female students choose science, technology, engineering and mathematics (STEM) fields at a tertiary level. Four African women scientists share their experiences in forging STEM careers. NATASHA JOSEPH, Freelance Commissioning Editor, The Conversation OGECHI EKEANYANWU, Commissioning Editor: Nigeria, The Conversation WALE FATADE, Commissioning Editor: Nigeria, The Conversation Dr Dayo Akande, Nigeria I can’t forget my experience as a secondary school student: after qualifying for a science competition at state level in 1989, I was asked to stay back and let my male schoolmate…