2021 is the 20th anniversary of the Stem Cell Network. We are celebrating our history, the milestones and the incredible people that have built this community with a new interview series, 20Q20. We asked 20 of Canada’s leading and up-and-coming stem cell scientists 20 questions – about their life, their work and their views on the stem cell sector. Dr. Tim Kieffer is a Professor in the Faculty of Medicine, Department of Cellular & Physiological Sciences, at the University of British Columbia.